./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:40:35,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:40:35,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:40:35,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:40:35,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:40:35,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:40:35,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:40:35,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:40:35,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:40:35,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:40:35,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:40:35,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:40:35,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:40:35,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:40:35,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:40:35,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:40:35,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:40:35,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:40:35,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:40:35,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:40:35,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:40:35,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:40:35,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:40:35,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:40:35,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:40:35,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:40:35,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:40:35,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:40:35,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:40:35,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:40:35,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:40:35,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:40:35,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:40:35,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:40:35,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:40:35,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:40:35,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:40:35,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:40:35,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:40:35,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:40:35,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:40:35,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:40:35,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:40:35,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:40:35,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:40:35,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:40:35,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:40:35,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:40:35,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:40:35,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:40:35,480 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:40:35,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:40:35,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:40:35,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:40:35,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:40:35,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:40:35,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:40:35,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:40:35,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:40:35,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:40:35,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:40:35,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:40:35,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:40:35,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:40:35,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:40:35,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:40:35,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:40:35,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:40:35,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:40:35,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:40:35,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:40:35,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:40:35,487 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:40:35,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:40:35,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:40:35,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:40:35,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2021-11-13 18:40:35,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:40:35,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:40:35,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:40:35,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:40:35,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:40:35,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/condn.c [2021-11-13 18:40:35,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/data/48d1e3f03/0556fcdd615c41e4a1d27a5cf05d504d/FLAGa693122c3 [2021-11-13 18:40:36,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:40:36,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/sv-benchmarks/c/array-fpi/condn.c [2021-11-13 18:40:36,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/data/48d1e3f03/0556fcdd615c41e4a1d27a5cf05d504d/FLAGa693122c3 [2021-11-13 18:40:36,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/data/48d1e3f03/0556fcdd615c41e4a1d27a5cf05d504d [2021-11-13 18:40:36,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:40:36,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:40:36,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:40:36,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:40:36,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:40:36,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:36,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc1083f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36, skipping insertion in model container [2021-11-13 18:40:36,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:36,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:40:36,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:40:36,908 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/sv-benchmarks/c/array-fpi/condn.c[588,601] [2021-11-13 18:40:36,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:40:36,933 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:40:36,946 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/sv-benchmarks/c/array-fpi/condn.c[588,601] [2021-11-13 18:40:36,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:40:36,967 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:40:36,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36 WrapperNode [2021-11-13 18:40:36,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:40:36,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:40:36,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:40:36,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:40:36,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:36,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:40:37,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:40:37,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:40:37,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:40:37,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:40:37,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:40:37,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:40:37,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:40:37,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (1/1) ... [2021-11-13 18:40:37,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:40:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:37,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:40:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:40:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:40:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:40:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:40:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:40:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:40:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:40:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:40:37,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:40:37,409 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:40:37,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:40:37 BoogieIcfgContainer [2021-11-13 18:40:37,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:40:37,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:40:37,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:40:37,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:40:37,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:40:36" (1/3) ... [2021-11-13 18:40:37,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535a9cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:40:37, skipping insertion in model container [2021-11-13 18:40:37,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:40:36" (2/3) ... [2021-11-13 18:40:37,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535a9cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:40:37, skipping insertion in model container [2021-11-13 18:40:37,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:40:37" (3/3) ... [2021-11-13 18:40:37,420 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2021-11-13 18:40:37,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:40:37,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:40:37,475 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:40:37,499 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:40:37,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:40:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:40:37,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:37,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:37,551 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2021-11-13 18:40:37,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:37,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472275339] [2021-11-13 18:40:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:37,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:37,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:37,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472275339] [2021-11-13 18:40:37,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472275339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:40:37,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:40:37,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:40:37,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806469996] [2021-11-13 18:40:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:40:37,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:40:37,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:37,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:40:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:40:37,780 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:37,797 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-13 18:40:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:40:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:40:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:37,808 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:40:37,808 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:40:37,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:40:37,816 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:37,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:40:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:40:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-13 18:40:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-13 18:40:37,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-13 18:40:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:37,852 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-13 18:40:37,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-13 18:40:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:40:37,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:37,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:37,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:40:37,855 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2021-11-13 18:40:37,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:37,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261309462] [2021-11-13 18:40:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:37,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:37,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:37,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261309462] [2021-11-13 18:40:37,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261309462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:40:37,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:40:37,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:40:37,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448326627] [2021-11-13 18:40:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:40:37,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:40:37,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:40:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:40:37,976 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:38,033 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-11-13 18:40:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:40:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:40:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:38,035 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:40:38,036 INFO L226 Difference]: Without dead ends: 29 [2021-11-13 18:40:38,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:40:38,038 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:38,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 44.28ms Time] [2021-11-13 18:40:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-13 18:40:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-13 18:40:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-13 18:40:38,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-11-13 18:40:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:38,047 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-13 18:40:38,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-13 18:40:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:40:38,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:38,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:38,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:40:38,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2021-11-13 18:40:38,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:38,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865860294] [2021-11-13 18:40:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:38,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:40:38,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:38,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865860294] [2021-11-13 18:40:38,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865860294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:38,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682135329] [2021-11-13 18:40:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:38,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:38,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:38,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:40:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:40:38,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:38,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 18:40:38,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-11-13 18:40:38,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-13 18:40:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:38,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:40:38,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682135329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:38,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:38,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2021-11-13 18:40:38,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98313919] [2021-11-13 18:40:38,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:38,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:40:38,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:40:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:40:38,917 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:39,215 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-11-13 18:40:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:40:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-13 18:40:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:39,217 INFO L225 Difference]: With dead ends: 47 [2021-11-13 18:40:39,217 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:40:39,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:40:39,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.50ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:39,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 67 Invalid, 178 Unknown, 0 Unchecked, 4.50ms Time], IncrementalHoareTripleChecker [38 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 133.48ms Time] [2021-11-13 18:40:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:40:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2021-11-13 18:40:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-13 18:40:39,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-11-13 18:40:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:39,229 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-13 18:40:39,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-13 18:40:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:40:39,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:39,231 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:39,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:40:39,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:39,451 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2021-11-13 18:40:39,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:39,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673249750] [2021-11-13 18:40:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:39,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:40:39,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:39,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673249750] [2021-11-13 18:40:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673249750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:39,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369443791] [2021-11-13 18:40:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:39,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:39,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:39,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:39,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:40:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:40:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:40:39,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:40:39,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369443791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:39,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:39,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-13 18:40:39,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90956819] [2021-11-13 18:40:39,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:39,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:40:39,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:40:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:40:39,893 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:40,038 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-11-13 18:40:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:40:40,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 18:40:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:40,040 INFO L225 Difference]: With dead ends: 62 [2021-11-13 18:40:40,041 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:40:40,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:40:40,046 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:40,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 106.80ms Time] [2021-11-13 18:40:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:40:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-11-13 18:40:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-13 18:40:40,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-11-13 18:40:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:40,069 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-13 18:40:40,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-13 18:40:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:40:40,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:40,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:40,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:40,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:40,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2021-11-13 18:40:40,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:40,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298683282] [2021-11-13 18:40:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:40,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:40,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:40,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298683282] [2021-11-13 18:40:40,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298683282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:40,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285323056] [2021-11-13 18:40:40,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:40:40,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:40,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:40,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:40:40,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:40:40,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:40,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:40:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:40,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:40,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:40:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:40:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:40:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:40:41,157 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:40:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 165 [2021-11-13 18:40:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:40:41,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285323056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:41,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:41,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 24 [2021-11-13 18:40:41,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769864280] [2021-11-13 18:40:41,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:40:41,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:40:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:40:41,225 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:42,002 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-13 18:40:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:40:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-13 18:40:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:42,003 INFO L225 Difference]: With dead ends: 61 [2021-11-13 18:40:42,004 INFO L226 Difference]: Without dead ends: 59 [2021-11-13 18:40:42,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:40:42,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.80ms SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 293.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:42,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 94 Invalid, 458 Unknown, 0 Unchecked, 3.80ms Time], IncrementalHoareTripleChecker [98 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 293.74ms Time] [2021-11-13 18:40:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-13 18:40:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-11-13 18:40:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-13 18:40:42,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2021-11-13 18:40:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:42,012 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-13 18:40:42,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-13 18:40:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 18:40:42,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:42,014 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:42,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 18:40:42,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:42,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2021-11-13 18:40:42,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:42,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094905063] [2021-11-13 18:40:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:40:42,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:42,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094905063] [2021-11-13 18:40:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094905063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:42,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478611859] [2021-11-13 18:40:42,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:40:42,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:42,339 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:42,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:40:42,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:40:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:40:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:40:42,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:40:42,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478611859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:42,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:42,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-13 18:40:42,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336357374] [2021-11-13 18:40:42,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:42,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:40:42,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:40:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:40:42,600 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:42,759 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-13 18:40:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:40:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-13 18:40:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:42,761 INFO L225 Difference]: With dead ends: 82 [2021-11-13 18:40:42,761 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 18:40:42,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:40:42,763 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:42,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 74 Invalid, 206 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [34 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 115.69ms Time] [2021-11-13 18:40:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 18:40:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-11-13 18:40:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-13 18:40:42,769 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2021-11-13 18:40:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:42,770 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-13 18:40:42,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-13 18:40:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:40:42,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:42,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:42,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:42,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:42,992 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2021-11-13 18:40:42,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:42,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329904193] [2021-11-13 18:40:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:42,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:43,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:43,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329904193] [2021-11-13 18:40:43,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329904193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:43,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390349970] [2021-11-13 18:40:43,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:40:43,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:43,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:43,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:40:43,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:40:43,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:40:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:43,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 18:40:43,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-13 18:40:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:40:43,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:43,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:40:43,981 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:40:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 165 [2021-11-13 18:40:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:40:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390349970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:44,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 12] total 33 [2021-11-13 18:40:44,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110189301] [2021-11-13 18:40:44,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:44,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:40:44,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:40:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:40:44,055 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:45,308 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-13 18:40:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:40:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:40:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:45,310 INFO L225 Difference]: With dead ends: 75 [2021-11-13 18:40:45,310 INFO L226 Difference]: Without dead ends: 73 [2021-11-13 18:40:45,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=664, Invalid=3758, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:40:45,313 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 195 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 355.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 421.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:45,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 146 Invalid, 803 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [194 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 421.25ms Time] [2021-11-13 18:40:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-13 18:40:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-11-13 18:40:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-13 18:40:45,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2021-11-13 18:40:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:45,321 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-13 18:40:45,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-13 18:40:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:40:45,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:45,322 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:45,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:45,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:45,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:45,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2021-11-13 18:40:45,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:45,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782356893] [2021-11-13 18:40:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:45,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:40:45,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:45,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782356893] [2021-11-13 18:40:45,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782356893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:45,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024254757] [2021-11-13 18:40:45,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:40:45,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:45,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:45,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:40:45,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:40:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:40:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:40:45,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:40:46,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024254757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:46,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:46,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-13 18:40:46,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222723591] [2021-11-13 18:40:46,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:46,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:40:46,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:40:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:40:46,038 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:46,188 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-11-13 18:40:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:40:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-13 18:40:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:46,190 INFO L225 Difference]: With dead ends: 102 [2021-11-13 18:40:46,190 INFO L226 Difference]: Without dead ends: 56 [2021-11-13 18:40:46,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:40:46,191 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:46,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 62 Invalid, 201 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [55 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 107.60ms Time] [2021-11-13 18:40:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-13 18:40:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-11-13 18:40:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-13 18:40:46,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2021-11-13 18:40:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:46,199 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-13 18:40:46,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-13 18:40:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:40:46,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:46,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:46,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:46,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:40:46,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2021-11-13 18:40:46,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:46,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33815104] [2021-11-13 18:40:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:46,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:46,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:46,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33815104] [2021-11-13 18:40:46,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33815104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:46,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729178421] [2021-11-13 18:40:46,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:40:46,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:46,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:46,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:46,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:40:46,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-13 18:40:46,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:46,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:40:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:46,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:40:47,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:47,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:47,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:40:48,544 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-13 18:40:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 39 [2021-11-13 18:40:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:48,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:40:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729178421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:52,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:52,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 15] total 39 [2021-11-13 18:40:52,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738390779] [2021-11-13 18:40:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:52,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:40:52,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:40:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1189, Unknown=2, NotChecked=0, Total=1482 [2021-11-13 18:40:52,971 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:53,889 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-11-13 18:40:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:40:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-13 18:40:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:53,891 INFO L225 Difference]: With dead ends: 93 [2021-11-13 18:40:53,891 INFO L226 Difference]: Without dead ends: 91 [2021-11-13 18:40:53,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=688, Invalid=3216, Unknown=2, NotChecked=0, Total=3906 [2021-11-13 18:40:53,894 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 202.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:53,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 145 Invalid, 383 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [72 Valid, 203 Invalid, 0 Unknown, 108 Unchecked, 202.31ms Time] [2021-11-13 18:40:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-13 18:40:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-11-13 18:40:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-13 18:40:53,904 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2021-11-13 18:40:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:53,909 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-13 18:40:53,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-13 18:40:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:40:53,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:53,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:53,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:54,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:54,127 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1938709510, now seen corresponding path program 1 times [2021-11-13 18:40:54,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:54,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765808384] [2021-11-13 18:40:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:54,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:54,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:54,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765808384] [2021-11-13 18:40:54,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765808384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:54,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757507586] [2021-11-13 18:40:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:54,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:54,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:54,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:40:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:40:54,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:40:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:40:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:55,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-13 18:40:55,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-13 18:40:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:40:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757507586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:55,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:55,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 12] total 33 [2021-11-13 18:40:55,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919864117] [2021-11-13 18:40:55,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:55,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:40:55,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:40:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:40:55,253 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:56,358 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2021-11-13 18:40:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:40:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-13 18:40:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:56,360 INFO L225 Difference]: With dead ends: 119 [2021-11-13 18:40:56,360 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 18:40:56,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=624, Invalid=3408, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:40:56,363 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 155 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 412.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.72ms SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 498.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:56,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 302 Invalid, 964 Unknown, 0 Unchecked, 5.72ms Time], IncrementalHoareTripleChecker [115 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 498.53ms Time] [2021-11-13 18:40:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 18:40:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 69. [2021-11-13 18:40:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-11-13 18:40:56,395 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 44 [2021-11-13 18:40:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-11-13 18:40:56,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-11-13 18:40:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 18:40:56,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:56,398 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:56,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:56,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:56,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1288199652, now seen corresponding path program 7 times [2021-11-13 18:40:56,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:56,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995046413] [2021-11-13 18:40:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:56,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:40:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:56,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995046413] [2021-11-13 18:40:56,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995046413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:56,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757287793] [2021-11-13 18:40:56,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:40:56,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:56,730 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:40:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:40:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:40:56,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:40:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757287793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:57,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-13 18:40:57,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027748148] [2021-11-13 18:40:57,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:57,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:40:57,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:40:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:40:57,118 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:57,344 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2021-11-13 18:40:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:40:57,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 18:40:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:57,345 INFO L225 Difference]: With dead ends: 171 [2021-11-13 18:40:57,346 INFO L226 Difference]: Without dead ends: 89 [2021-11-13 18:40:57,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:40:57,347 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 235 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:57,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 77 Invalid, 286 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [99 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 157.77ms Time] [2021-11-13 18:40:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-13 18:40:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-11-13 18:40:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-11-13 18:40:57,363 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 47 [2021-11-13 18:40:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:57,363 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-11-13 18:40:57,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-11-13 18:40:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 18:40:57,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:57,364 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:57,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:57,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:57,565 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 534659294, now seen corresponding path program 8 times [2021-11-13 18:40:57,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:57,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315611214] [2021-11-13 18:40:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:57,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:40:57,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:57,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315611214] [2021-11-13 18:40:57,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315611214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:57,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634726967] [2021-11-13 18:40:57,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:40:57,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:57,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:57,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:40:58,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:40:58,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:58,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:40:58,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:58,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:58,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:58,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:40:58,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:40:58,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-13 18:40:58,316 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-13 18:40:58,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 47 [2021-11-13 18:40:58,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-11-13 18:40:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:40:58,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:58,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:40:58,951 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:40:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 165 [2021-11-13 18:40:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:40:59,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634726967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:59,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:59,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-11-13 18:40:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968193] [2021-11-13 18:40:59,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:40:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:40:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:40:59,027 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:00,004 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2021-11-13 18:41:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:41:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-13 18:41:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:00,005 INFO L225 Difference]: With dead ends: 111 [2021-11-13 18:41:00,005 INFO L226 Difference]: Without dead ends: 109 [2021-11-13 18:41:00,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:41:00,007 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 413.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 498.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 169 Invalid, 866 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [119 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 498.66ms Time] [2021-11-13 18:41:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-13 18:41:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 54. [2021-11-13 18:41:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-13 18:41:00,018 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 49 [2021-11-13 18:41:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:00,018 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-13 18:41:00,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-13 18:41:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 18:41:00,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:00,020 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:00,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:00,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:00,235 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 9 times [2021-11-13 18:41:00,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:00,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405461968] [2021-11-13 18:41:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:00,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:00,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:00,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405461968] [2021-11-13 18:41:00,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405461968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:00,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936112253] [2021-11-13 18:41:00,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:00,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:00,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:00,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:00,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:41:00,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:41:00,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 18:41:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:00,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:41:01,704 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-13 18:41:01,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-11-13 18:41:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:41:01,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-11-13 18:41:02,191 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-13 18:41:02,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-13 18:41:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:41:02,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936112253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:02,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:02,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 17] total 50 [2021-11-13 18:41:02,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655445745] [2021-11-13 18:41:02,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:02,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:41:02,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:41:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:41:02,518 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 50 states, 50 states have (on average 2.62) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:04,930 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2021-11-13 18:41:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-13 18:41:04,931 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.62) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-13 18:41:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:04,932 INFO L225 Difference]: With dead ends: 125 [2021-11-13 18:41:04,932 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 18:41:04,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1241, Invalid=9679, Unknown=0, NotChecked=0, Total=10920 [2021-11-13 18:41:04,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 159 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 515.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.78ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 600.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:04,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 316 Invalid, 1117 Unknown, 0 Unchecked, 13.78ms Time], IncrementalHoareTripleChecker [94 Valid, 884 Invalid, 0 Unknown, 139 Unchecked, 600.74ms Time] [2021-11-13 18:41:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 18:41:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 81. [2021-11-13 18:41:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-11-13 18:41:04,952 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 53 [2021-11-13 18:41:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:04,952 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-11-13 18:41:04,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.62) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-11-13 18:41:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:41:04,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:04,954 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:04,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:05,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:41:05,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:05,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash -273043412, now seen corresponding path program 10 times [2021-11-13 18:41:05,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:05,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108517839] [2021-11-13 18:41:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:05,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:41:05,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:05,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108517839] [2021-11-13 18:41:05,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108517839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:05,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282615816] [2021-11-13 18:41:05,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:41:05,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:05,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:05,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:41:05,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:41:05,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:41:05,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:41:05,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:41:05,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282615816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:05,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:05,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-13 18:41:05,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800735993] [2021-11-13 18:41:05,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:05,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:41:05,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:41:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:41:05,753 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:06,013 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2021-11-13 18:41:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:41:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-13 18:41:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:06,015 INFO L225 Difference]: With dead ends: 167 [2021-11-13 18:41:06,015 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 18:41:06,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:41:06,017 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 206 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:06,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 93 Invalid, 307 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [94 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 180.35ms Time] [2021-11-13 18:41:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 18:41:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-11-13 18:41:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-11-13 18:41:06,027 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 56 [2021-11-13 18:41:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:06,027 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-11-13 18:41:06,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-11-13 18:41:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:41:06,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:06,029 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:06,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:06,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:41:06,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash -783512662, now seen corresponding path program 11 times [2021-11-13 18:41:06,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:06,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885468518] [2021-11-13 18:41:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:06,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:06,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:06,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885468518] [2021-11-13 18:41:06,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885468518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:06,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035243160] [2021-11-13 18:41:06,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:41:06,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:06,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:06,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:06,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:41:07,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-13 18:41:07,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:41:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:07,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:07,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:41:07,276 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-13 18:41:07,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:41:07,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:41:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:41:07,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:41:07,942 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:41:07,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:41:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:41:08,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035243160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:08,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:08,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 41 [2021-11-13 18:41:08,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561611101] [2021-11-13 18:41:08,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:41:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:41:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:41:08,058 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:10,395 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-11-13 18:41:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 18:41:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-13 18:41:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:10,397 INFO L225 Difference]: With dead ends: 107 [2021-11-13 18:41:10,397 INFO L226 Difference]: Without dead ends: 105 [2021-11-13 18:41:10,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=960, Invalid=8546, Unknown=0, NotChecked=0, Total=9506 [2021-11-13 18:41:10,401 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 184 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 582.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 720.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:10,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 317 Invalid, 1462 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [239 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 720.54ms Time] [2021-11-13 18:41:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-13 18:41:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2021-11-13 18:41:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-11-13 18:41:10,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 58 [2021-11-13 18:41:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:10,416 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-11-13 18:41:10,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-11-13 18:41:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:41:10,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:10,417 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:10,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:41:10,623 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 12 times [2021-11-13 18:41:10,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:10,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732901309] [2021-11-13 18:41:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:10,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:11,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:11,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732901309] [2021-11-13 18:41:11,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732901309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:11,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326656700] [2021-11-13 18:41:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:41:11,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:11,122 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:11,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:41:11,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:41:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 18:41:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:11,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:41:11,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:11,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:11,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:11,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:41:12,670 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-13 18:41:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2021-11-13 18:41:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:12,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:41:13,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326656700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:13,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:13,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 19] total 64 [2021-11-13 18:41:13,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584981136] [2021-11-13 18:41:13,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:13,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-13 18:41:13,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-13 18:41:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=3422, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:41:13,753 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 64 states, 64 states have (on average 2.515625) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:17,944 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2021-11-13 18:41:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-13 18:41:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.515625) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-13 18:41:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:17,946 INFO L225 Difference]: With dead ends: 178 [2021-11-13 18:41:17,947 INFO L226 Difference]: Without dead ends: 176 [2021-11-13 18:41:17,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2536, Invalid=15554, Unknown=0, NotChecked=0, Total=18090 [2021-11-13 18:41:17,952 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 683.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 795.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:17,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 467 Invalid, 1771 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [182 Valid, 1393 Invalid, 0 Unknown, 196 Unchecked, 795.86ms Time] [2021-11-13 18:41:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-13 18:41:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 119. [2021-11-13 18:41:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 118 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 152 transitions. [2021-11-13 18:41:17,973 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 152 transitions. Word has length 62 [2021-11-13 18:41:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:17,973 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 152 transitions. [2021-11-13 18:41:17,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.515625) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 152 transitions. [2021-11-13 18:41:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:41:17,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:17,975 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:17,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:18,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:41:18,175 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2050675296, now seen corresponding path program 2 times [2021-11-13 18:41:18,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:18,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274331287] [2021-11-13 18:41:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:18,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:18,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274331287] [2021-11-13 18:41:18,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274331287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086941510] [2021-11-13 18:41:18,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:18,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:18,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:18,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:18,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:41:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:41:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:41:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:41:19,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-13 18:41:19,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-13 18:41:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:41:19,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086941510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:19,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:19,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 16] total 39 [2021-11-13 18:41:19,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39443742] [2021-11-13 18:41:19,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:19,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:41:19,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:41:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:41:19,548 INFO L87 Difference]: Start difference. First operand 119 states and 152 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:21,328 INFO L93 Difference]: Finished difference Result 223 states and 260 transitions. [2021-11-13 18:41:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-13 18:41:21,329 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-13 18:41:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:21,330 INFO L225 Difference]: With dead ends: 223 [2021-11-13 18:41:21,330 INFO L226 Difference]: Without dead ends: 221 [2021-11-13 18:41:21,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=743, Invalid=5577, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:41:21,331 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 171 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 597.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 718.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:21,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 507 Invalid, 1638 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [135 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 718.07ms Time] [2021-11-13 18:41:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-13 18:41:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 121. [2021-11-13 18:41:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3) internal successors, (156), 120 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2021-11-13 18:41:21,351 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 62 [2021-11-13 18:41:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:21,351 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2021-11-13 18:41:21,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2021-11-13 18:41:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:41:21,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:21,353 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:21,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:21,567 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash 248677408, now seen corresponding path program 3 times [2021-11-13 18:41:21,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:21,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359343124] [2021-11-13 18:41:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:21,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:22,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:22,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359343124] [2021-11-13 18:41:22,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359343124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:22,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010759373] [2021-11-13 18:41:22,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:22,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:22,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:22,045 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:22,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:41:22,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-13 18:41:22,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:22,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:41:22,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:22,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:41:23,341 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 18:41:23,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-11-13 18:41:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:41:23,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 76 [2021-11-13 18:41:24,252 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:41:24,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 82 [2021-11-13 18:41:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 89 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:41:24,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010759373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:24,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:24,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 19] total 61 [2021-11-13 18:41:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253963199] [2021-11-13 18:41:24,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 18:41:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 18:41:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=3235, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 18:41:24,514 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 61 states, 61 states have (on average 2.540983606557377) internal successors, (155), 61 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:27,761 INFO L93 Difference]: Finished difference Result 228 states and 279 transitions. [2021-11-13 18:41:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-13 18:41:27,761 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.540983606557377) internal successors, (155), 61 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-13 18:41:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:27,762 INFO L225 Difference]: With dead ends: 228 [2021-11-13 18:41:27,762 INFO L226 Difference]: Without dead ends: 177 [2021-11-13 18:41:27,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4865 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2221, Invalid=14809, Unknown=0, NotChecked=0, Total=17030 [2021-11-13 18:41:27,764 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 317.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:27,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 305 Invalid, 959 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [165 Valid, 468 Invalid, 0 Unknown, 326 Unchecked, 317.53ms Time] [2021-11-13 18:41:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-13 18:41:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 117. [2021-11-13 18:41:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2021-11-13 18:41:27,791 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 62 [2021-11-13 18:41:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:27,791 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2021-11-13 18:41:27,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.540983606557377) internal successors, (155), 61 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2021-11-13 18:41:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:41:27,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:27,793 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:27,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:27,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:41:27,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 129921934, now seen corresponding path program 4 times [2021-11-13 18:41:27,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:27,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028131455] [2021-11-13 18:41:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:28,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:28,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:28,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028131455] [2021-11-13 18:41:28,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028131455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:28,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159187339] [2021-11-13 18:41:28,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:41:28,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:28,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:28,191 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:28,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:41:28,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:41:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:41:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:28,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:28,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159187339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:28,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:28,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-13 18:41:28,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484891797] [2021-11-13 18:41:28,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:28,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:41:28,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:41:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:41:28,792 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:29,092 INFO L93 Difference]: Finished difference Result 287 states and 355 transitions. [2021-11-13 18:41:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:41:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-13 18:41:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:29,094 INFO L225 Difference]: With dead ends: 287 [2021-11-13 18:41:29,094 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 18:41:29,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:41:29,096 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:29,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 144 Invalid, 449 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [84 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 209.07ms Time] [2021-11-13 18:41:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 18:41:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2021-11-13 18:41:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.275) internal successors, (153), 120 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2021-11-13 18:41:29,111 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 65 [2021-11-13 18:41:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:29,111 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2021-11-13 18:41:29,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2021-11-13 18:41:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:41:29,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:29,112 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:29,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:29,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:29,327 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:29,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:29,327 INFO L85 PathProgramCache]: Analyzing trace with hash -631790128, now seen corresponding path program 5 times [2021-11-13 18:41:29,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:29,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9166651] [2021-11-13 18:41:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:29,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:29,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:29,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9166651] [2021-11-13 18:41:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9166651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:29,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820519230] [2021-11-13 18:41:29,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:41:29,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:29,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:29,658 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:29,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:41:29,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-13 18:41:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-13 18:41:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:29,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:29,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:29,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:41:30,066 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-13 18:41:30,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-13 18:41:30,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:41:30,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:41:30,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-13 18:41:30,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340472911] [2021-11-13 18:41:30,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:30,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:41:30,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:30,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:41:30,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:41:30,137 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:30,989 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2021-11-13 18:41:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:41:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-13 18:41:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:30,991 INFO L225 Difference]: With dead ends: 249 [2021-11-13 18:41:30,991 INFO L226 Difference]: Without dead ends: 247 [2021-11-13 18:41:30,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:41:30,992 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 401.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 481.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:30,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 326 Invalid, 1126 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [86 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 481.99ms Time] [2021-11-13 18:41:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-13 18:41:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 133. [2021-11-13 18:41:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2021-11-13 18:41:31,013 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 67 [2021-11-13 18:41:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:31,013 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2021-11-13 18:41:31,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2021-11-13 18:41:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 18:41:31,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:31,014 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:31,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:31,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-13 18:41:31,215 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 13 times [2021-11-13 18:41:31,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:31,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93642765] [2021-11-13 18:41:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:31,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:31,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:31,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93642765] [2021-11-13 18:41:31,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93642765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:31,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163227100] [2021-11-13 18:41:31,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:41:31,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:31,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:31,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:41:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 18:41:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:31,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:31,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:31,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:31,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:31,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:41:32,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:41:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:41:32,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:32,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:41:32,852 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:41:32,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:41:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:41:32,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163227100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:32,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:32,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 43 [2021-11-13 18:41:32,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711417817] [2021-11-13 18:41:32,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:32,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:41:32,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:41:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1660, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:41:32,894 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:34,513 INFO L93 Difference]: Finished difference Result 236 states and 291 transitions. [2021-11-13 18:41:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 18:41:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-13 18:41:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:34,514 INFO L225 Difference]: With dead ends: 236 [2021-11-13 18:41:34,514 INFO L226 Difference]: Without dead ends: 234 [2021-11-13 18:41:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=452, Invalid=5400, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:41:34,516 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 136 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 678.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 808.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 479 Invalid, 1973 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [128 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 808.47ms Time] [2021-11-13 18:41:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-13 18:41:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 159. [2021-11-13 18:41:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2721518987341771) internal successors, (201), 158 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2021-11-13 18:41:34,542 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 71 [2021-11-13 18:41:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:34,543 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2021-11-13 18:41:34,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2021-11-13 18:41:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 18:41:34,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:34,543 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:34,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:34,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:34,747 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash -708207664, now seen corresponding path program 6 times [2021-11-13 18:41:34,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:34,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831308903] [2021-11-13 18:41:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:34,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 95 proven. 71 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:34,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:34,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831308903] [2021-11-13 18:41:34,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831308903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:34,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056742948] [2021-11-13 18:41:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:41:34,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:34,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:34,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:41:35,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-13 18:41:35,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:41:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 117 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 117 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:35,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056742948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:35,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:35,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2021-11-13 18:41:35,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183549253] [2021-11-13 18:41:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:35,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:41:35,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:41:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:41:35,544 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:36,128 INFO L93 Difference]: Finished difference Result 469 states and 590 transitions. [2021-11-13 18:41:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:41:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-13 18:41:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:36,131 INFO L225 Difference]: With dead ends: 469 [2021-11-13 18:41:36,131 INFO L226 Difference]: Without dead ends: 293 [2021-11-13 18:41:36,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=571, Invalid=1979, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:41:36,132 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 632 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 336.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:36,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 183 Invalid, 717 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [257 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 336.21ms Time] [2021-11-13 18:41:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-13 18:41:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 230. [2021-11-13 18:41:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.2358078602620088) internal successors, (283), 229 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 283 transitions. [2021-11-13 18:41:36,172 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 283 transitions. Word has length 73 [2021-11-13 18:41:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:36,172 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 283 transitions. [2021-11-13 18:41:36,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 283 transitions. [2021-11-13 18:41:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:41:36,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:36,174 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:36,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:36,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 18:41:36,395 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash -873581612, now seen corresponding path program 7 times [2021-11-13 18:41:36,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:36,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313191079] [2021-11-13 18:41:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:36,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 4 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:37,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:37,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313191079] [2021-11-13 18:41:37,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313191079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:37,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402595768] [2021-11-13 18:41:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:41:37,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:37,431 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:37,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:41:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-13 18:41:37,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:37,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:37,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:37,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:37,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:41:37,793 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-13 18:41:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-13 18:41:37,890 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-13 18:41:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-13 18:41:37,991 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-13 18:41:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-13 18:41:38,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:41:38,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:41:38,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-13 18:41:38,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016841235] [2021-11-13 18:41:38,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:38,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:41:38,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:41:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:41:38,137 INFO L87 Difference]: Start difference. First operand 230 states and 283 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:41,083 INFO L93 Difference]: Finished difference Result 353 states and 410 transitions. [2021-11-13 18:41:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-13 18:41:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-13 18:41:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:41,085 INFO L225 Difference]: With dead ends: 353 [2021-11-13 18:41:41,085 INFO L226 Difference]: Without dead ends: 351 [2021-11-13 18:41:41,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3133 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1094, Invalid=10248, Unknown=0, NotChecked=0, Total=11342 [2021-11-13 18:41:41,086 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 292 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 921.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.67ms SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1112.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:41,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 726 Invalid, 2612 Unknown, 0 Unchecked, 5.67ms Time], IncrementalHoareTripleChecker [289 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 1112.82ms Time] [2021-11-13 18:41:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-13 18:41:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 232. [2021-11-13 18:41:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.2424242424242424) internal successors, (287), 231 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 287 transitions. [2021-11-13 18:41:41,139 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 287 transitions. Word has length 77 [2021-11-13 18:41:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 287 transitions. [2021-11-13 18:41:41,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 287 transitions. [2021-11-13 18:41:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:41:41,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:41,141 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:41,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:41,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:41:41,351 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash 122414920, now seen corresponding path program 14 times [2021-11-13 18:41:41,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:41,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806202590] [2021-11-13 18:41:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:41,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:42,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:42,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806202590] [2021-11-13 18:41:42,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806202590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:42,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321829179] [2021-11-13 18:41:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:42,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:42,131 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:41:42,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-13 18:41:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:41:42,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:41:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:41:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:41:43,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:43,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:41:44,009 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:41:44,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:41:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:41:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321829179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:44,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:44,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 22] total 60 [2021-11-13 18:41:44,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613866655] [2021-11-13 18:41:44,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:44,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-13 18:41:44,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:44,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-13 18:41:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3283, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:41:44,057 INFO L87 Difference]: Start difference. First operand 232 states and 287 transitions. Second operand has 60 states, 60 states have (on average 3.2) internal successors, (192), 60 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:47,743 INFO L93 Difference]: Finished difference Result 360 states and 430 transitions. [2021-11-13 18:41:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-13 18:41:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.2) internal successors, (192), 60 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-13 18:41:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:47,745 INFO L225 Difference]: With dead ends: 360 [2021-11-13 18:41:47,745 INFO L226 Difference]: Without dead ends: 261 [2021-11-13 18:41:47,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 122 SyntacticMatches, 11 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3978 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1430, Invalid=14070, Unknown=0, NotChecked=0, Total=15500 [2021-11-13 18:41:47,747 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 359 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 2728 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1087.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.41ms SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1283.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:47,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 644 Invalid, 3036 Unknown, 0 Unchecked, 5.41ms Time], IncrementalHoareTripleChecker [308 Valid, 2728 Invalid, 0 Unknown, 0 Unchecked, 1283.66ms Time] [2021-11-13 18:41:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-13 18:41:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-11-13 18:41:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.2415730337078652) internal successors, (221), 178 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions. [2021-11-13 18:41:47,781 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 80 [2021-11-13 18:41:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:47,782 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions. [2021-11-13 18:41:47,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.2) internal successors, (192), 60 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions. [2021-11-13 18:41:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:41:47,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:47,783 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:47,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:47,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:47,999 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash -586623524, now seen corresponding path program 8 times [2021-11-13 18:41:47,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:47,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679917784] [2021-11-13 18:41:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:47,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 120 proven. 106 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:48,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:48,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679917784] [2021-11-13 18:41:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679917784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:48,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839277405] [2021-11-13 18:41:48,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:48,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:48,247 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:48,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:41:48,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:48,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:41:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:48,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:41:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839277405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:48,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:48,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-13 18:41:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547708819] [2021-11-13 18:41:48,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:41:48,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:41:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:41:48,870 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:49,262 INFO L93 Difference]: Finished difference Result 426 states and 526 transitions. [2021-11-13 18:41:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:41:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-13 18:41:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:49,270 INFO L225 Difference]: With dead ends: 426 [2021-11-13 18:41:49,271 INFO L226 Difference]: Without dead ends: 337 [2021-11-13 18:41:49,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:41:49,272 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 383 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:49,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 190 Invalid, 593 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [138 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 258.52ms Time] [2021-11-13 18:41:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-13 18:41:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2021-11-13 18:41:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.231372549019608) internal successors, (314), 255 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 314 transitions. [2021-11-13 18:41:49,319 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 314 transitions. Word has length 80 [2021-11-13 18:41:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:49,320 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 314 transitions. [2021-11-13 18:41:49,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 314 transitions. [2021-11-13 18:41:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 18:41:49,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:49,321 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:49,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:49,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:49,542 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:49,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash 172005210, now seen corresponding path program 9 times [2021-11-13 18:41:49,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:49,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534800661] [2021-11-13 18:41:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:49,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 9 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:50,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:50,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534800661] [2021-11-13 18:41:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534800661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:50,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574257958] [2021-11-13 18:41:50,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:50,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:50,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:50,742 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:50,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 18:41:50,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-13 18:41:50,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 18:41:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:51,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:41:51,272 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-13 18:41:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-13 18:41:51,336 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-13 18:41:51,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-13 18:41:51,402 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-13 18:41:51,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-13 18:41:51,539 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-13 18:41:51,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-13 18:41:52,519 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-13 18:41:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 42 [2021-11-13 18:41:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 19 proven. 195 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:41:52,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:53,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-13 18:41:53,563 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-13 18:41:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 77 [2021-11-13 18:41:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:41:54,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574257958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:54,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 25] total 77 [2021-11-13 18:41:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068868169] [2021-11-13 18:41:54,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:54,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-13 18:41:54,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-13 18:41:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=4998, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:41:54,031 INFO L87 Difference]: Start difference. First operand 256 states and 314 transitions. Second operand has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:03,809 INFO L93 Difference]: Finished difference Result 506 states and 575 transitions. [2021-11-13 18:42:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-13 18:42:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-13 18:42:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:03,811 INFO L225 Difference]: With dead ends: 506 [2021-11-13 18:42:03,811 INFO L226 Difference]: Without dead ends: 469 [2021-11-13 18:42:03,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 126 SyntacticMatches, 12 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22863 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=7107, Invalid=58685, Unknown=0, NotChecked=0, Total=65792 [2021-11-13 18:42:03,814 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 568 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 3448 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1518.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 4373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.48ms SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 3448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 1789.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:03,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 1119 Invalid, 4373 Unknown, 0 Unchecked, 8.48ms Time], IncrementalHoareTripleChecker [495 Valid, 3448 Invalid, 0 Unknown, 430 Unchecked, 1789.41ms Time] [2021-11-13 18:42:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-13 18:42:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 208. [2021-11-13 18:42:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.144927536231884) internal successors, (237), 207 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 237 transitions. [2021-11-13 18:42:03,865 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 237 transitions. Word has length 82 [2021-11-13 18:42:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 237 transitions. [2021-11-13 18:42:03,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 237 transitions. [2021-11-13 18:42:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 18:42:03,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:03,867 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:03,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-13 18:42:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:42:04,087 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 910882804, now seen corresponding path program 15 times [2021-11-13 18:42:04,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:04,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331832608] [2021-11-13 18:42:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:04,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:04,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:04,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331832608] [2021-11-13 18:42:04,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331832608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:04,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587140218] [2021-11-13 18:42:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:42:04,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:04,992 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:05,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:42:05,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-13 18:42:05,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-13 18:42:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:05,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:42:05,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:42:06,634 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-13 18:42:06,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-11-13 18:42:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 17 proven. 245 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:42:06,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:42:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587140218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:08,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:08,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 25] total 74 [2021-11-13 18:42:08,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18554699] [2021-11-13 18:42:08,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:08,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-13 18:42:08,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-13 18:42:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=4685, Unknown=0, NotChecked=0, Total=5402 [2021-11-13 18:42:08,591 INFO L87 Difference]: Start difference. First operand 208 states and 237 transitions. Second operand has 74 states, 74 states have (on average 3.0135135135135136) internal successors, (223), 74 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:19,420 INFO L93 Difference]: Finished difference Result 457 states and 534 transitions. [2021-11-13 18:42:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-11-13 18:42:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.0135135135135136) internal successors, (223), 74 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-13 18:42:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:19,422 INFO L225 Difference]: With dead ends: 457 [2021-11-13 18:42:19,422 INFO L226 Difference]: Without dead ends: 286 [2021-11-13 18:42:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 133 SyntacticMatches, 10 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20843 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=6447, Invalid=53823, Unknown=0, NotChecked=0, Total=60270 [2021-11-13 18:42:19,425 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 492 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1216.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 3516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 1415.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:19,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 1158 Invalid, 3516 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [456 Valid, 2667 Invalid, 0 Unknown, 393 Unchecked, 1415.47ms Time] [2021-11-13 18:42:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-13 18:42:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 226. [2021-11-13 18:42:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.248888888888889) internal successors, (281), 225 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 281 transitions. [2021-11-13 18:42:19,483 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 281 transitions. Word has length 89 [2021-11-13 18:42:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:19,483 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 281 transitions. [2021-11-13 18:42:19,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.0135135135135136) internal successors, (223), 74 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 281 transitions. [2021-11-13 18:42:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 18:42:19,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:19,484 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:19,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:19,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:42:19,703 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1615318788, now seen corresponding path program 10 times [2021-11-13 18:42:19,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:19,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658853545] [2021-11-13 18:42:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:19,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:20,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:20,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658853545] [2021-11-13 18:42:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658853545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:20,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11106719] [2021-11-13 18:42:20,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:42:20,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:20,359 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:20,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 18:42:20,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:42:20,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:20,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:42:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:20,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:20,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:42:20,700 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-13 18:42:20,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-13 18:42:20,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:42:20,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:42:20,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-13 18:42:20,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962890772] [2021-11-13 18:42:20,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:20,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:42:20,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:42:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:42:20,756 INFO L87 Difference]: Start difference. First operand 226 states and 281 transitions. Second operand has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:22,247 INFO L93 Difference]: Finished difference Result 463 states and 549 transitions. [2021-11-13 18:42:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 18:42:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-13 18:42:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:22,250 INFO L225 Difference]: With dead ends: 463 [2021-11-13 18:42:22,250 INFO L226 Difference]: Without dead ends: 461 [2021-11-13 18:42:22,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=3149, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:42:22,251 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 121 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 680.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 813.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:22,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 533 Invalid, 1970 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [118 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 813.29ms Time] [2021-11-13 18:42:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-13 18:42:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 274. [2021-11-13 18:42:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.293040293040293) internal successors, (353), 273 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 353 transitions. [2021-11-13 18:42:22,328 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 353 transitions. Word has length 94 [2021-11-13 18:42:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:22,328 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 353 transitions. [2021-11-13 18:42:22,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 353 transitions. [2021-11-13 18:42:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 18:42:22,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:22,329 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:22,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:22,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:42:22,530 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1367172294, now seen corresponding path program 11 times [2021-11-13 18:42:22,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:22,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320900261] [2021-11-13 18:42:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:22,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 1 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:23,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:23,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320900261] [2021-11-13 18:42:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320900261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:23,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418367749] [2021-11-13 18:42:23,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:42:23,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:23,065 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:23,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-13 18:42:23,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-13 18:42:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:42:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:23,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:42:23,618 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-13 18:42:23,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-13 18:42:24,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:42:24,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:42:24,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-13 18:42:24,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825998993] [2021-11-13 18:42:24,052 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:24,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:42:24,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:24,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:42:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:42:24,053 INFO L87 Difference]: Start difference. First operand 274 states and 353 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:26,563 INFO L93 Difference]: Finished difference Result 499 states and 599 transitions. [2021-11-13 18:42:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-13 18:42:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-13 18:42:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:26,566 INFO L225 Difference]: With dead ends: 499 [2021-11-13 18:42:26,566 INFO L226 Difference]: Without dead ends: 497 [2021-11-13 18:42:26,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=311, Invalid=4110, Unknown=1, NotChecked=0, Total=4422 [2021-11-13 18:42:26,572 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 808.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 982.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:26,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 931 Invalid, 2652 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [99 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 982.98ms Time] [2021-11-13 18:42:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-13 18:42:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 222. [2021-11-13 18:42:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.3212669683257918) internal successors, (292), 221 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 292 transitions. [2021-11-13 18:42:26,618 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 292 transitions. Word has length 94 [2021-11-13 18:42:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:26,618 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 292 transitions. [2021-11-13 18:42:26,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 292 transitions. [2021-11-13 18:42:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 18:42:26,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:26,619 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:26,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:26,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:42:26,820 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash -194350928, now seen corresponding path program 16 times [2021-11-13 18:42:26,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:26,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476210012] [2021-11-13 18:42:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:26,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:27,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:27,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476210012] [2021-11-13 18:42:27,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476210012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:27,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087080524] [2021-11-13 18:42:27,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:42:27,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:27,740 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:27,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 18:42:27,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:42:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 18:42:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:27,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:27,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:42:28,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:42:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:42:28,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:29,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:42:29,882 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:42:29,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:42:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:42:29,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087080524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:29,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:29,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 25, 26] total 71 [2021-11-13 18:42:29,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119661114] [2021-11-13 18:42:29,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:29,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-13 18:42:29,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-13 18:42:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4653, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:42:29,947 INFO L87 Difference]: Start difference. First operand 222 states and 292 transitions. Second operand has 71 states, 71 states have (on average 3.295774647887324) internal successors, (234), 71 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:35,028 INFO L93 Difference]: Finished difference Result 401 states and 493 transitions. [2021-11-13 18:42:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-13 18:42:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.295774647887324) internal successors, (234), 71 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-13 18:42:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:35,031 INFO L225 Difference]: With dead ends: 401 [2021-11-13 18:42:35,031 INFO L226 Difference]: Without dead ends: 399 [2021-11-13 18:42:35,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 152 SyntacticMatches, 12 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5707 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1812, Invalid=20538, Unknown=0, NotChecked=0, Total=22350 [2021-11-13 18:42:35,034 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 490 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1386.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 4031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.20ms SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1639.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:35,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 879 Invalid, 4031 Unknown, 0 Unchecked, 7.20ms Time], IncrementalHoareTripleChecker [401 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 1639.97ms Time] [2021-11-13 18:42:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-13 18:42:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 222. [2021-11-13 18:42:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 221 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 281 transitions. [2021-11-13 18:42:35,109 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 281 transitions. Word has length 98 [2021-11-13 18:42:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:35,110 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 281 transitions. [2021-11-13 18:42:35,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.295774647887324) internal successors, (234), 71 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 281 transitions. [2021-11-13 18:42:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:42:35,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:35,111 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:35,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:35,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:35,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1408788612, now seen corresponding path program 12 times [2021-11-13 18:42:35,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:35,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107354661] [2021-11-13 18:42:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:35,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 179 proven. 131 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:42:35,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:35,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107354661] [2021-11-13 18:42:35,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107354661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:35,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60098405] [2021-11-13 18:42:35,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:42:35,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:35,634 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:35,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 18:42:36,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-13 18:42:36,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:42:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 210 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:42:36,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 210 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:42:36,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60098405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:36,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:36,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2021-11-13 18:42:36,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178721399] [2021-11-13 18:42:36,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:36,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:42:36,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:42:36,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:42:36,974 INFO L87 Difference]: Start difference. First operand 222 states and 281 transitions. Second operand has 43 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:37,777 INFO L93 Difference]: Finished difference Result 615 states and 769 transitions. [2021-11-13 18:42:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 18:42:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 18:42:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:37,779 INFO L225 Difference]: With dead ends: 615 [2021-11-13 18:42:37,779 INFO L226 Difference]: Without dead ends: 370 [2021-11-13 18:42:37,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=919, Invalid=3371, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:42:37,780 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 862 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 372.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 452.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:37,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 275 Invalid, 1057 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [333 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 452.59ms Time] [2021-11-13 18:42:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-13 18:42:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 312. [2021-11-13 18:42:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.2379421221864952) internal successors, (385), 311 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 385 transitions. [2021-11-13 18:42:37,857 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 385 transitions. Word has length 100 [2021-11-13 18:42:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:37,857 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 385 transitions. [2021-11-13 18:42:37,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 385 transitions. [2021-11-13 18:42:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:42:37,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:37,858 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:37,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:38,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:38,063 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash -553116424, now seen corresponding path program 13 times [2021-11-13 18:42:38,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:38,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794523765] [2021-11-13 18:42:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:38,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 4 proven. 478 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:39,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:39,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794523765] [2021-11-13 18:42:39,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794523765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:39,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534997929] [2021-11-13 18:42:39,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:42:39,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:39,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:39,328 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:39,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 18:42:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-13 18:42:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:39,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:39,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:42:39,881 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-13 18:42:39,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-13 18:42:40,005 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-13 18:42:40,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-13 18:42:40,103 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-13 18:42:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-13 18:42:40,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:42:40,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:42:40,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-11-13 18:42:40,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291652345] [2021-11-13 18:42:40,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:40,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:42:40,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:42:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2095, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:42:40,251 INFO L87 Difference]: Start difference. First operand 312 states and 385 transitions. Second operand has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:45,133 INFO L93 Difference]: Finished difference Result 466 states and 540 transitions. [2021-11-13 18:42:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 18:42:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-13 18:42:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:45,137 INFO L225 Difference]: With dead ends: 466 [2021-11-13 18:42:45,137 INFO L226 Difference]: Without dead ends: 464 [2021-11-13 18:42:45,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5065 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1481, Invalid=17151, Unknown=0, NotChecked=0, Total=18632 [2021-11-13 18:42:45,139 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 427 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 4100 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1580.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.97ms SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 4100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1876.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:45,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 1235 Invalid, 4502 Unknown, 0 Unchecked, 9.97ms Time], IncrementalHoareTripleChecker [402 Valid, 4100 Invalid, 0 Unknown, 0 Unchecked, 1876.60ms Time] [2021-11-13 18:42:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-13 18:42:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 313. [2021-11-13 18:42:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.2403846153846154) internal successors, (387), 312 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 387 transitions. [2021-11-13 18:42:45,219 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 387 transitions. Word has length 104 [2021-11-13 18:42:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:45,219 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 387 transitions. [2021-11-13 18:42:45,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 387 transitions. [2021-11-13 18:42:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:42:45,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:45,221 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:45,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:45,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 18:42:45,447 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1409534820, now seen corresponding path program 17 times [2021-11-13 18:42:45,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:45,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356186149] [2021-11-13 18:42:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:45,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:46,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:46,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356186149] [2021-11-13 18:42:46,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356186149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:46,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831883990] [2021-11-13 18:42:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:42:46,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:46,231 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:46,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-13 18:42:46,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-13 18:42:46,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-13 18:42:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-13 18:42:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:42:46,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:42:47,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:42:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:47,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:42:48,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831883990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:48,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:48,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 63 [2021-11-13 18:42:48,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444392496] [2021-11-13 18:42:48,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:48,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-13 18:42:48,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-13 18:42:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3688, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 18:42:48,915 INFO L87 Difference]: Start difference. First operand 313 states and 387 transitions. Second operand has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:52,365 INFO L93 Difference]: Finished difference Result 478 states and 571 transitions. [2021-11-13 18:42:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-13 18:42:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-13 18:42:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:52,367 INFO L225 Difference]: With dead ends: 478 [2021-11-13 18:42:52,367 INFO L226 Difference]: Without dead ends: 343 [2021-11-13 18:42:52,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 166 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=664, Invalid=11992, Unknown=0, NotChecked=0, Total=12656 [2021-11-13 18:42:52,369 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 230 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 3907 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1431.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.96ms SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 3907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1699.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:52,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 931 Invalid, 4123 Unknown, 0 Unchecked, 6.96ms Time], IncrementalHoareTripleChecker [216 Valid, 3907 Invalid, 0 Unknown, 0 Unchecked, 1699.74ms Time] [2021-11-13 18:42:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-13 18:42:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 239. [2021-11-13 18:42:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.2521008403361344) internal successors, (298), 238 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 298 transitions. [2021-11-13 18:42:52,453 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 298 transitions. Word has length 107 [2021-11-13 18:42:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:52,453 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 298 transitions. [2021-11-13 18:42:52,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 298 transitions. [2021-11-13 18:42:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:42:52,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:52,455 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:52,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:52,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:52,663 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1530339652, now seen corresponding path program 14 times [2021-11-13 18:42:52,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:52,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275778484] [2021-11-13 18:42:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:52,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 213 proven. 178 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:42:53,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275778484] [2021-11-13 18:42:53,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275778484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813582314] [2021-11-13 18:42:53,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:42:53,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:53,016 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:53,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 18:42:53,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:42:53,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:42:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:42:53,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:42:54,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813582314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:54,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:54,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2021-11-13 18:42:54,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775844475] [2021-11-13 18:42:54,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:54,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-13 18:42:54,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-13 18:42:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:42:54,056 INFO L87 Difference]: Start difference. First operand 239 states and 298 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:54,623 INFO L93 Difference]: Finished difference Result 540 states and 668 transitions. [2021-11-13 18:42:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:42:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-13 18:42:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:54,625 INFO L225 Difference]: With dead ends: 540 [2021-11-13 18:42:54,625 INFO L226 Difference]: Without dead ends: 403 [2021-11-13 18:42:54,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 18:42:54,626 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 560 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 266.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 334.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:54,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 219 Invalid, 799 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [218 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 334.48ms Time] [2021-11-13 18:42:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-13 18:42:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 333. [2021-11-13 18:42:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.2319277108433735) internal successors, (409), 332 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 409 transitions. [2021-11-13 18:42:54,706 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 409 transitions. Word has length 107 [2021-11-13 18:42:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:54,706 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 409 transitions. [2021-11-13 18:42:54,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 409 transitions. [2021-11-13 18:42:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:42:54,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:54,708 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:54,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:54,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:54,909 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash 178396798, now seen corresponding path program 15 times [2021-11-13 18:42:54,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:54,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299582372] [2021-11-13 18:42:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:54,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 9 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:56,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:56,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299582372] [2021-11-13 18:42:56,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299582372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:56,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516793001] [2021-11-13 18:42:56,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:42:56,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:56,838 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:56,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-13 18:42:57,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-13 18:42:57,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 18:42:57,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:57,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:42:58,065 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-13 18:42:58,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-13 18:42:58,149 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-13 18:42:58,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-13 18:42:58,236 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-13 18:42:58,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-13 18:42:58,379 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-13 18:42:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-13 18:43:00,069 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-13 18:43:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 42 [2021-11-13 18:43:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 125 proven. 327 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:43:00,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:43:01,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-11-13 18:43:01,827 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-13 18:43:01,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 160 [2021-11-13 18:43:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:43:03,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516793001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:43:03,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:43:03,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 38, 38] total 116 [2021-11-13 18:43:03,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621460457] [2021-11-13 18:43:03,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:43:03,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-13 18:43:03,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-13 18:43:03,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=12410, Unknown=0, NotChecked=0, Total=13340 [2021-11-13 18:43:03,485 INFO L87 Difference]: Start difference. First operand 333 states and 409 transitions. Second operand has 116 states, 116 states have (on average 2.3620689655172415) internal successors, (274), 116 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:43,797 INFO L93 Difference]: Finished difference Result 3766 states and 5011 transitions. [2021-11-13 18:45:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1352 states. [2021-11-13 18:45:43,797 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3620689655172415) internal successors, (274), 116 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-13 18:45:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:43,812 INFO L225 Difference]: With dead ends: 3766 [2021-11-13 18:45:43,812 INFO L226 Difference]: Without dead ends: 3717 [2021-11-13 18:45:43,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1694 GetRequests, 179 SyntacticMatches, 74 SemanticMatches, 1441 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 972328 ImplicationChecksByTransitivity, 153.7s TimeCoverageRelationStatistics Valid=82071, Invalid=1998735, Unknown=0, NotChecked=0, Total=2080806 [2021-11-13 18:45:43,922 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 2863 mSDsluCounter, 5196 mSDsCounter, 0 mSdLazyCounter, 14465 mSolverCounterSat, 4973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7618.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2863 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 29348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.82ms SdHoareTripleChecker+Time, 4973 IncrementalHoareTripleChecker+Valid, 14465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9910 IncrementalHoareTripleChecker+Unchecked, 9048.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:43,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2863 Valid, 5307 Invalid, 29348 Unknown, 0 Unchecked, 57.82ms Time], IncrementalHoareTripleChecker [4973 Valid, 14465 Invalid, 0 Unknown, 9910 Unchecked, 9048.03ms Time] [2021-11-13 18:45:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2021-11-13 18:45:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 1267. [2021-11-13 18:45:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 1.3744075829383886) internal successors, (1740), 1266 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1740 transitions. [2021-11-13 18:45:44,355 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1740 transitions. Word has length 109 [2021-11-13 18:45:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:44,355 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 1740 transitions. [2021-11-13 18:45:44,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3620689655172415) internal successors, (274), 116 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1740 transitions. [2021-11-13 18:45:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:45:44,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:44,359 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 9, 9, 8, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:44,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:44,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-13 18:45:44,587 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1370625802, now seen corresponding path program 16 times [2021-11-13 18:45:44,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:44,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964217903] [2021-11-13 18:45:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:44,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 250 proven. 206 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:45:44,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:44,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964217903] [2021-11-13 18:45:44,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964217903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:44,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378679918] [2021-11-13 18:45:44,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:45:44,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:44,933 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:44,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-13 18:45:44,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:45:44,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:44,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:45:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:45:45,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:45:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378679918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:45,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-11-13 18:45:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304705085] [2021-11-13 18:45:45,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 18:45:45,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 18:45:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:45:45,952 INFO L87 Difference]: Start difference. First operand 1267 states and 1740 transitions. Second operand has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:47,029 INFO L93 Difference]: Finished difference Result 1636 states and 2202 transitions. [2021-11-13 18:45:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-13 18:45:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-13 18:45:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:47,034 INFO L225 Difference]: With dead ends: 1636 [2021-11-13 18:45:47,034 INFO L226 Difference]: Without dead ends: 1121 [2021-11-13 18:45:47,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1246, Invalid=4304, Unknown=0, NotChecked=0, Total=5550 [2021-11-13 18:45:47,035 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1029 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 381.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 464.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:47,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 300 Invalid, 1100 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [348 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 464.64ms Time] [2021-11-13 18:45:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-13 18:45:47,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 647. [2021-11-13 18:45:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.2554179566563468) internal successors, (811), 646 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 811 transitions. [2021-11-13 18:45:47,223 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 811 transitions. Word has length 112 [2021-11-13 18:45:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:47,223 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 811 transitions. [2021-11-13 18:45:47,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 811 transitions. [2021-11-13 18:45:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 18:45:47,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:47,225 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:47,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:47,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-13 18:45:47,427 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:47,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1044221708, now seen corresponding path program 17 times [2021-11-13 18:45:47,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:47,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354268388] [2021-11-13 18:45:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:47,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 9 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:48,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:48,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354268388] [2021-11-13 18:45:48,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354268388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:48,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488629847] [2021-11-13 18:45:48,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:45:48,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:48,591 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:48,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 18:45:48,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-13 18:45:48,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-13 18:45:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:49,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:49,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:49,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:45:49,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-11-13 18:45:49,192 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-13 18:45:49,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2021-11-13 18:45:49,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-11-13 18:45:49,271 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-13 18:45:49,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2021-11-13 18:45:49,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-11-13 18:45:49,353 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-13 18:45:49,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2021-11-13 18:45:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2021-11-13 18:45:49,474 INFO L354 Elim1Store]: treesize reduction 110, result has 16.0 percent of original size [2021-11-13 18:45:49,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 72 [2021-11-13 18:45:49,573 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-13 18:45:49,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-13 18:45:49,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:45:49,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:45:49,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-13 18:45:49,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899323992] [2021-11-13 18:45:49,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:49,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:45:49,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:45:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1359, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:45:49,645 INFO L87 Difference]: Start difference. First operand 647 states and 811 transitions. Second operand has 34 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 34 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:52,506 INFO L93 Difference]: Finished difference Result 880 states and 1056 transitions. [2021-11-13 18:45:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-13 18:45:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 34 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-13 18:45:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:52,510 INFO L225 Difference]: With dead ends: 880 [2021-11-13 18:45:52,510 INFO L226 Difference]: Without dead ends: 878 [2021-11-13 18:45:52,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 21 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=435, Invalid=5885, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:45:52,511 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 248 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1212.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.01ms SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1468.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:52,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 957 Invalid, 3531 Unknown, 0 Unchecked, 7.01ms Time], IncrementalHoareTripleChecker [246 Valid, 3285 Invalid, 0 Unknown, 0 Unchecked, 1468.07ms Time] [2021-11-13 18:45:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-13 18:45:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 517. [2021-11-13 18:45:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.2306201550387597) internal successors, (635), 516 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 635 transitions. [2021-11-13 18:45:52,644 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 635 transitions. Word has length 114 [2021-11-13 18:45:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:52,644 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 635 transitions. [2021-11-13 18:45:52,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 34 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 635 transitions. [2021-11-13 18:45:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:45:52,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:52,646 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:52,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:52,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-13 18:45:52,875 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1109917208, now seen corresponding path program 18 times [2021-11-13 18:45:52,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:52,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194397525] [2021-11-13 18:45:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:52,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:53,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:53,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194397525] [2021-11-13 18:45:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194397525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:53,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903091834] [2021-11-13 18:45:53,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:45:53,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:53,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:53,643 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:53,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-13 18:45:54,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-13 18:45:54,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:45:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:45:54,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:45:54,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:45:56,180 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-13 18:45:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2021-11-13 18:45:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 254 proven. 221 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:45:56,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:46:01,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903091834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:01,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:01,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 31] total 89 [2021-11-13 18:46:01,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647082205] [2021-11-13 18:46:01,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:01,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-13 18:46:01,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:01,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-13 18:46:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=6718, Unknown=0, NotChecked=0, Total=7832 [2021-11-13 18:46:01,870 INFO L87 Difference]: Start difference. First operand 517 states and 635 transitions. Second operand has 89 states, 89 states have (on average 3.269662921348315) internal successors, (291), 89 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:05,557 INFO L93 Difference]: Finished difference Result 768 states and 921 transitions. [2021-11-13 18:46:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-13 18:46:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.269662921348315) internal successors, (291), 89 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-13 18:46:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:05,560 INFO L225 Difference]: With dead ends: 768 [2021-11-13 18:46:05,560 INFO L226 Difference]: Without dead ends: 664 [2021-11-13 18:46:05,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 185 SyntacticMatches, 23 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7103 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2987, Invalid=24403, Unknown=0, NotChecked=0, Total=27390 [2021-11-13 18:46:05,564 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 86 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 494.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 561.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:05,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 894 Invalid, 1356 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [30 Valid, 996 Invalid, 0 Unknown, 330 Unchecked, 561.35ms Time] [2021-11-13 18:46:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-13 18:46:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 618. [2021-11-13 18:46:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.2447325769854134) internal successors, (768), 617 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 768 transitions. [2021-11-13 18:46:05,757 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 768 transitions. Word has length 116 [2021-11-13 18:46:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:05,757 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 768 transitions. [2021-11-13 18:46:05,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.269662921348315) internal successors, (291), 89 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 768 transitions. [2021-11-13 18:46:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:46:05,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:05,759 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:05,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:05,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-13 18:46:05,963 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:05,963 INFO L85 PathProgramCache]: Analyzing trace with hash -918668902, now seen corresponding path program 18 times [2021-11-13 18:46:05,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:05,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207703490] [2021-11-13 18:46:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:05,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:07,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:07,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207703490] [2021-11-13 18:46:07,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207703490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:07,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243311417] [2021-11-13 18:46:07,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:46:07,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:07,331 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:07,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-13 18:46:07,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-13 18:46:07,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:07,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:46:07,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:08,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:46:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:08,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-13 18:46:10,837 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-13 18:46:10,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 45 [2021-11-13 18:46:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 89 proven. 386 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:46:10,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-11-13 18:46:13,345 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 18:46:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 95 [2021-11-13 18:46:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:46:14,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243311417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:14,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:14,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 36, 33] total 108 [2021-11-13 18:46:14,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346941373] [2021-11-13 18:46:14,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:14,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-13 18:46:14,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:14,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-13 18:46:14,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=9914, Unknown=1, NotChecked=0, Total=11556 [2021-11-13 18:46:14,044 INFO L87 Difference]: Start difference. First operand 618 states and 768 transitions. Second operand has 108 states, 108 states have (on average 2.7314814814814814) internal successors, (295), 108 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:29,050 INFO L93 Difference]: Finished difference Result 1055 states and 1258 transitions. [2021-11-13 18:46:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-11-13 18:46:29,051 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.7314814814814814) internal successors, (295), 108 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-13 18:46:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:29,054 INFO L225 Difference]: With dead ends: 1055 [2021-11-13 18:46:29,054 INFO L226 Difference]: Without dead ends: 852 [2021-11-13 18:46:29,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 191 SyntacticMatches, 20 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31750 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=10225, Invalid=78280, Unknown=1, NotChecked=0, Total=88506 [2021-11-13 18:46:29,059 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 600 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 452.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.83ms SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 786 IncrementalHoareTripleChecker+Unchecked, 522.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:29,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 1141 Invalid, 1995 Unknown, 0 Unchecked, 5.83ms Time], IncrementalHoareTripleChecker [547 Valid, 662 Invalid, 0 Unknown, 786 Unchecked, 522.74ms Time] [2021-11-13 18:46:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-13 18:46:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 544. [2021-11-13 18:46:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.2265193370165746) internal successors, (666), 543 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 666 transitions. [2021-11-13 18:46:29,189 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 666 transitions. Word has length 116 [2021-11-13 18:46:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:29,189 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 666 transitions. [2021-11-13 18:46:29,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.7314814814814814) internal successors, (295), 108 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 666 transitions. [2021-11-13 18:46:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:46:29,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:29,192 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:29,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-13 18:46:29,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-13 18:46:29,399 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1985936214, now seen corresponding path program 19 times [2021-11-13 18:46:29,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:29,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643104097] [2021-11-13 18:46:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:29,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:30,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:30,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643104097] [2021-11-13 18:46:30,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643104097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:30,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268798138] [2021-11-13 18:46:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:46:30,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:30,127 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:30,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-13 18:46:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:30,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 18:46:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:30,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:46:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:46:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:31,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:31,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-13 18:46:31,712 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-13 18:46:31,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-11-13 18:46:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:46:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268798138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:31,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:31,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 56 [2021-11-13 18:46:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364786245] [2021-11-13 18:46:31,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-13 18:46:31,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-13 18:46:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2894, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:46:31,893 INFO L87 Difference]: Start difference. First operand 544 states and 666 transitions. Second operand has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:35,545 INFO L93 Difference]: Finished difference Result 763 states and 891 transitions. [2021-11-13 18:46:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-13 18:46:35,545 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-13 18:46:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:35,548 INFO L225 Difference]: With dead ends: 763 [2021-11-13 18:46:35,548 INFO L226 Difference]: Without dead ends: 587 [2021-11-13 18:46:35,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 201 SyntacticMatches, 18 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=617, Invalid=11373, Unknown=0, NotChecked=0, Total=11990 [2021-11-13 18:46:35,549 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1543.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.44ms SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1862.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:35,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1089 Invalid, 4764 Unknown, 0 Unchecked, 7.44ms Time], IncrementalHoareTripleChecker [188 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 1862.86ms Time] [2021-11-13 18:46:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-13 18:46:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 408. [2021-11-13 18:46:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.2235872235872236) internal successors, (498), 407 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 498 transitions. [2021-11-13 18:46:35,668 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 498 transitions. Word has length 116 [2021-11-13 18:46:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:35,668 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 498 transitions. [2021-11-13 18:46:35,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 498 transitions. [2021-11-13 18:46:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 18:46:35,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:35,670 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:35,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:35,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-13 18:46:35,879 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1871343342, now seen corresponding path program 20 times [2021-11-13 18:46:35,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:35,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303896691] [2021-11-13 18:46:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:35,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 18:46:36,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:36,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303896691] [2021-11-13 18:46:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303896691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:36,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833377135] [2021-11-13 18:46:36,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:36,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:36,825 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:36,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-13 18:46:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-13 18:46:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 18:46:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-13 18:46:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:37,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:38,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-13 18:46:38,572 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-13 18:46:38,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-11-13 18:46:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 18:46:38,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833377135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:38,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:38,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 76 [2021-11-13 18:46:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134090490] [2021-11-13 18:46:38,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-13 18:46:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-13 18:46:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=5357, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:46:38,698 INFO L87 Difference]: Start difference. First operand 408 states and 498 transitions. Second operand has 76 states, 76 states have (on average 3.6315789473684212) internal successors, (276), 76 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:42,776 INFO L93 Difference]: Finished difference Result 560 states and 654 transitions. [2021-11-13 18:46:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-13 18:46:42,777 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.6315789473684212) internal successors, (276), 76 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-13 18:46:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:42,779 INFO L225 Difference]: With dead ends: 560 [2021-11-13 18:46:42,779 INFO L226 Difference]: Without dead ends: 260 [2021-11-13 18:46:42,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6151 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=997, Invalid=17093, Unknown=0, NotChecked=0, Total=18090 [2021-11-13 18:46:42,782 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 274 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 5109 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1673.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 5368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.31ms SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 5109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2006.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:42,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1164 Invalid, 5368 Unknown, 0 Unchecked, 8.31ms Time], IncrementalHoareTripleChecker [259 Valid, 5109 Invalid, 0 Unknown, 0 Unchecked, 2006.11ms Time] [2021-11-13 18:46:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-13 18:46:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 135. [2021-11-13 18:46:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.126865671641791) internal successors, (151), 134 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-11-13 18:46:42,835 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 125 [2021-11-13 18:46:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:42,835 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-11-13 18:46:42,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.6315789473684212) internal successors, (276), 76 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-11-13 18:46:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 18:46:42,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:42,836 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:42,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:43,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-13 18:46:43,055 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash -554152064, now seen corresponding path program 19 times [2021-11-13 18:46:43,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:43,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575758019] [2021-11-13 18:46:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:43,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:44,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:44,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575758019] [2021-11-13 18:46:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575758019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:44,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135985675] [2021-11-13 18:46:44,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:46:44,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:44,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:44,462 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:44,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-13 18:46:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-13 18:46:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:44,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:46:44,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:46:45,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:46:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:45,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:48,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:46:48,468 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:46:48,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:46:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-13 18:46:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135985675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:48,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:48,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 33, 34] total 96 [2021-11-13 18:46:48,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089103279] [2021-11-13 18:46:48,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:48,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-13 18:46:48,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-13 18:46:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=8656, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:46:48,526 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 96 states, 96 states have (on average 3.4375) internal successors, (330), 96 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:57,293 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2021-11-13 18:46:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-13 18:46:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4375) internal successors, (330), 96 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-13 18:46:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:57,294 INFO L225 Difference]: With dead ends: 229 [2021-11-13 18:46:57,295 INFO L226 Difference]: Without dead ends: 227 [2021-11-13 18:46:57,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 206 SyntacticMatches, 17 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10518 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2693, Invalid=38313, Unknown=0, NotChecked=0, Total=41006 [2021-11-13 18:46:57,297 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 562 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 7238 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2730.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 7732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.56ms SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 7238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3214.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:57,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1534 Invalid, 7732 Unknown, 0 Unchecked, 12.56ms Time], IncrementalHoareTripleChecker [494 Valid, 7238 Invalid, 0 Unknown, 0 Unchecked, 3214.49ms Time] [2021-11-13 18:46:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-13 18:46:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 139. [2021-11-13 18:46:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1231884057971016) internal successors, (155), 138 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2021-11-13 18:46:57,331 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 134 [2021-11-13 18:46:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:57,332 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2021-11-13 18:46:57,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4375) internal successors, (330), 96 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2021-11-13 18:46:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 18:46:57,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:57,332 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:57,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-13 18:46:57,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:57,533 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 204638902, now seen corresponding path program 20 times [2021-11-13 18:46:57,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:57,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848412095] [2021-11-13 18:46:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:57,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 339 proven. 249 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-13 18:46:57,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:57,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848412095] [2021-11-13 18:46:57,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848412095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:57,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137712879] [2021-11-13 18:46:57,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:57,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:57,964 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:57,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-13 18:46:58,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:58,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 18:46:58,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 392 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-13 18:46:58,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 392 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-13 18:46:59,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137712879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:59,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:59,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2021-11-13 18:46:59,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234163739] [2021-11-13 18:46:59,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:59,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:46:59,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:46:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:46:59,058 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:59,681 INFO L93 Difference]: Finished difference Result 322 states and 359 transitions. [2021-11-13 18:46:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:46:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-13 18:46:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:59,682 INFO L225 Difference]: With dead ends: 322 [2021-11-13 18:46:59,682 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 18:46:59,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:46:59,683 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 552 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 322.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 393.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:59,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 278 Invalid, 982 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [207 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 393.42ms Time] [2021-11-13 18:46:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 18:46:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2021-11-13 18:46:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1258741258741258) internal successors, (161), 143 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2021-11-13 18:46:59,719 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 138 [2021-11-13 18:46:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:59,720 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2021-11-13 18:46:59,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2021-11-13 18:46:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 18:46:59,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:59,721 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:59,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:59,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:59,923 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:59,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1762263484, now seen corresponding path program 21 times [2021-11-13 18:46:59,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:59,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267862689] [2021-11-13 18:46:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:59,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:01,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:01,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267862689] [2021-11-13 18:47:01,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267862689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:01,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564605176] [2021-11-13 18:47:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:01,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:01,386 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:01,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-13 18:47:01,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-13 18:47:01,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:01,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:47:01,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:02,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:47:04,543 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-13 18:47:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 42 [2021-11-13 18:47:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 407 proven. 344 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-13 18:47:04,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:06,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-13 18:47:06,963 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 18:47:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-13 18:47:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 364 proven. 358 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-13 18:47:08,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564605176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:08,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:08,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 39, 37] total 125 [2021-11-13 18:47:08,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057439062] [2021-11-13 18:47:08,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:08,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-13 18:47:08,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-13 18:47:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1777, Invalid=13723, Unknown=0, NotChecked=0, Total=15500 [2021-11-13 18:47:08,659 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand has 125 states, 125 states have (on average 2.888) internal successors, (361), 125 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:19,227 INFO L93 Difference]: Finished difference Result 302 states and 323 transitions. [2021-11-13 18:47:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-13 18:47:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.888) internal successors, (361), 125 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-13 18:47:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:19,228 INFO L225 Difference]: With dead ends: 302 [2021-11-13 18:47:19,228 INFO L226 Difference]: Without dead ends: 179 [2021-11-13 18:47:19,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20379 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=7614, Invalid=69392, Unknown=0, NotChecked=0, Total=77006 [2021-11-13 18:47:19,234 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 193 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 741.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.47ms SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 850.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:19,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1182 Invalid, 2505 Unknown, 0 Unchecked, 5.47ms Time], IncrementalHoareTripleChecker [400 Valid, 1423 Invalid, 0 Unknown, 682 Unchecked, 850.27ms Time] [2021-11-13 18:47:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-13 18:47:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2021-11-13 18:47:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.13013698630137) internal successors, (165), 146 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2021-11-13 18:47:19,277 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 143 [2021-11-13 18:47:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:19,277 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2021-11-13 18:47:19,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.888) internal successors, (361), 125 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2021-11-13 18:47:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 18:47:19,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:19,278 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:19,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:19,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-13 18:47:19,482 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1362138956, now seen corresponding path program 22 times [2021-11-13 18:47:19,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:19,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147767770] [2021-11-13 18:47:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:19,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 333 proven. 268 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-13 18:47:19,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:19,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147767770] [2021-11-13 18:47:19,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147767770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:19,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789091666] [2021-11-13 18:47:19,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:19,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:19,983 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:20,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-13 18:47:20,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:20,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 18:47:20,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 376 proven. 225 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-13 18:47:20,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 376 proven. 225 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-13 18:47:21,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789091666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:21,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:21,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-11-13 18:47:21,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369430177] [2021-11-13 18:47:21,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:21,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 18:47:21,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 18:47:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:47:21,145 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:21,686 INFO L93 Difference]: Finished difference Result 277 states and 314 transitions. [2021-11-13 18:47:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-13 18:47:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-13 18:47:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:21,687 INFO L225 Difference]: With dead ends: 277 [2021-11-13 18:47:21,688 INFO L226 Difference]: Without dead ends: 166 [2021-11-13 18:47:21,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 18:47:21,689 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 561 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 315.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:21,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 90 Invalid, 750 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [196 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 315.76ms Time] [2021-11-13 18:47:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-13 18:47:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2021-11-13 18:47:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 148 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2021-11-13 18:47:21,728 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 146 [2021-11-13 18:47:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:21,728 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2021-11-13 18:47:21,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2021-11-13 18:47:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 18:47:21,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:21,730 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:21,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:21,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-13 18:47:21,931 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 969790130, now seen corresponding path program 23 times [2021-11-13 18:47:21,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:21,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103301678] [2021-11-13 18:47:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:21,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:23,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:23,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103301678] [2021-11-13 18:47:23,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103301678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:23,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778187696] [2021-11-13 18:47:23,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:23,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:23,957 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:23,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-13 18:47:24,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-13 18:47:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-13 18:47:24,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:24,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:47:24,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:47:24,847 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-13 18:47:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:47:25,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:47:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1018 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:47:25,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:28,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:47:28,159 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:47:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 165 [2021-11-13 18:47:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 766 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-13 18:47:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778187696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:28,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:28,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 35, 36] total 98 [2021-11-13 18:47:28,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058527500] [2021-11-13 18:47:28,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-13 18:47:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-13 18:47:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=9009, Unknown=0, NotChecked=0, Total=9506 [2021-11-13 18:47:28,304 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 98 states, 98 states have (on average 3.510204081632653) internal successors, (344), 98 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:39,870 INFO L93 Difference]: Finished difference Result 247 states and 268 transitions. [2021-11-13 18:47:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-11-13 18:47:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.510204081632653) internal successors, (344), 98 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-13 18:47:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:39,872 INFO L225 Difference]: With dead ends: 247 [2021-11-13 18:47:39,872 INFO L226 Difference]: Without dead ends: 245 [2021-11-13 18:47:39,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 240 SyntacticMatches, 15 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16241 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3206, Invalid=56574, Unknown=0, NotChecked=0, Total=59780 [2021-11-13 18:47:39,877 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 483 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 7912 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3106.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 8617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.96ms SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 7912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3659.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:39,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 1930 Invalid, 8617 Unknown, 0 Unchecked, 15.96ms Time], IncrementalHoareTripleChecker [705 Valid, 7912 Invalid, 0 Unknown, 0 Unchecked, 3659.62ms Time] [2021-11-13 18:47:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-13 18:47:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 153. [2021-11-13 18:47:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.125) internal successors, (171), 152 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2021-11-13 18:47:39,919 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 148 [2021-11-13 18:47:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:39,919 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2021-11-13 18:47:39,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.510204081632653) internal successors, (344), 98 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2021-11-13 18:47:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:47:39,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:39,920 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:39,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:40,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:40,121 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash 760161512, now seen corresponding path program 24 times [2021-11-13 18:47:40,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:40,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634033483] [2021-11-13 18:47:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:40,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:42,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:42,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634033483] [2021-11-13 18:47:42,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634033483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:42,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822865652] [2021-11-13 18:47:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:42,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:42,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:42,023 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:42,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-13 18:47:42,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-13 18:47:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:42,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-13 18:47:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:47:45,943 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-13 18:47:45,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 42 [2021-11-13 18:47:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-13 18:47:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:48,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2021-11-13 18:47:48,693 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 18:47:48,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 78 [2021-11-13 18:47:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-13 18:47:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822865652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:48,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 39, 39] total 114 [2021-11-13 18:47:48,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649329135] [2021-11-13 18:47:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:48,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-13 18:47:48,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-13 18:47:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=11614, Unknown=0, NotChecked=0, Total=12882 [2021-11-13 18:47:48,837 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 114 states, 114 states have (on average 2.93859649122807) internal successors, (335), 114 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:56,240 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2021-11-13 18:47:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-13 18:47:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.93859649122807) internal successors, (335), 114 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-13 18:47:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:56,242 INFO L225 Difference]: With dead ends: 256 [2021-11-13 18:47:56,242 INFO L226 Difference]: Without dead ends: 188 [2021-11-13 18:47:56,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10861 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=4859, Invalid=41581, Unknown=0, NotChecked=0, Total=46440 [2021-11-13 18:47:56,246 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 171 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 634.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 751.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:56,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1066 Invalid, 2017 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [276 Valid, 1535 Invalid, 0 Unknown, 206 Unchecked, 751.01ms Time] [2021-11-13 18:47:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-13 18:47:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-11-13 18:47:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1290322580645162) internal successors, (175), 155 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2021-11-13 18:47:56,311 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 152 [2021-11-13 18:47:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:56,311 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2021-11-13 18:47:56,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.93859649122807) internal successors, (335), 114 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2021-11-13 18:47:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:47:56,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:56,312 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:56,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:56,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-13 18:47:56,512 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash -455992214, now seen corresponding path program 21 times [2021-11-13 18:47:56,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:56,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795647462] [2021-11-13 18:47:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:56,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:57,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:57,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795647462] [2021-11-13 18:47:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795647462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:57,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28150956] [2021-11-13 18:47:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:57,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:57,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:57,618 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:57,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-13 18:47:59,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-13 18:47:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:47:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:59,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:48:01,989 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-13 18:48:01,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 42 [2021-11-13 18:48:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 481 proven. 271 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-13 18:48:02,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:04,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-13 18:48:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-13 18:48:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 420 proven. 332 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-13 18:48:04,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28150956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:04,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:04,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 41, 41] total 96 [2021-11-13 18:48:04,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741691099] [2021-11-13 18:48:04,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:04,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-13 18:48:04,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-13 18:48:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1071, Invalid=8049, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:48:04,466 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand has 96 states, 96 states have (on average 3.3645833333333335) internal successors, (323), 96 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:12,662 INFO L93 Difference]: Finished difference Result 550 states and 606 transitions. [2021-11-13 18:48:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-11-13 18:48:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.3645833333333335) internal successors, (323), 96 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-13 18:48:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:12,664 INFO L225 Difference]: With dead ends: 550 [2021-11-13 18:48:12,664 INFO L226 Difference]: Without dead ends: 298 [2021-11-13 18:48:12,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 295 SyntacticMatches, 18 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11741 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4024, Invalid=42416, Unknown=0, NotChecked=0, Total=46440 [2021-11-13 18:48:12,668 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 477 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 3837 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1279.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 5883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.20ms SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1898 IncrementalHoareTripleChecker+Unchecked, 1532.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:12,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 1161 Invalid, 5883 Unknown, 0 Unchecked, 10.20ms Time], IncrementalHoareTripleChecker [148 Valid, 3837 Invalid, 0 Unknown, 1898 Unchecked, 1532.56ms Time] [2021-11-13 18:48:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-13 18:48:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 214. [2021-11-13 18:48:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.187793427230047) internal successors, (253), 213 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 253 transitions. [2021-11-13 18:48:12,731 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 253 transitions. Word has length 152 [2021-11-13 18:48:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:12,731 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 253 transitions. [2021-11-13 18:48:12,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.3645833333333335) internal successors, (323), 96 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 253 transitions. [2021-11-13 18:48:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-13 18:48:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:12,732 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:12,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:12,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:12,932 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:12,933 INFO L85 PathProgramCache]: Analyzing trace with hash -725763906, now seen corresponding path program 22 times [2021-11-13 18:48:12,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:12,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453390580] [2021-11-13 18:48:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:12,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 379 proven. 302 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-13 18:48:13,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:13,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453390580] [2021-11-13 18:48:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453390580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:13,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583281502] [2021-11-13 18:48:13,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:48:13,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:13,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:13,499 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:13,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-13 18:48:13,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:48:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:48:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 425 proven. 256 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-13 18:48:14,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 425 proven. 256 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-13 18:48:14,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583281502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:14,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:14,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2021-11-13 18:48:14,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890297100] [2021-11-13 18:48:14,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:14,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-13 18:48:14,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:14,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-13 18:48:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:48:14,779 INFO L87 Difference]: Start difference. First operand 214 states and 253 transitions. Second operand has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:15,402 INFO L93 Difference]: Finished difference Result 316 states and 362 transitions. [2021-11-13 18:48:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:48:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-13 18:48:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:15,404 INFO L225 Difference]: With dead ends: 316 [2021-11-13 18:48:15,404 INFO L226 Difference]: Without dead ends: 175 [2021-11-13 18:48:15,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:48:15,405 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 492 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 294.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:15,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 117 Invalid, 867 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [174 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 360.45ms Time] [2021-11-13 18:48:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-13 18:48:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2021-11-13 18:48:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.127388535031847) internal successors, (177), 157 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2021-11-13 18:48:15,447 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 155 [2021-11-13 18:48:15,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:15,447 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2021-11-13 18:48:15,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2021-11-13 18:48:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-13 18:48:15,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:15,448 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:15,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:15,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-13 18:48:15,649 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash -672476802, now seen corresponding path program 25 times [2021-11-13 18:48:15,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:15,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883821797] [2021-11-13 18:48:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:15,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 1164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:17,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:17,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883821797] [2021-11-13 18:48:17,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883821797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:17,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128711504] [2021-11-13 18:48:17,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:48:17,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:17,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:17,708 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:17,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-13 18:48:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-13 18:48:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:17,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:17,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:18,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:48:18,426 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-13 18:48:18,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:48:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:48:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 1158 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:48:19,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:48:23,299 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:48:23,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 165 [2021-11-13 18:48:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 873 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-13 18:48:23,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128711504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:23,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:23,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 37, 38] total 110 [2021-11-13 18:48:23,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466420420] [2021-11-13 18:48:23,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:23,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-13 18:48:23,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-13 18:48:23,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=11428, Unknown=0, NotChecked=0, Total=11990 [2021-11-13 18:48:23,371 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand has 110 states, 110 states have (on average 3.5) internal successors, (385), 110 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:37,676 INFO L93 Difference]: Finished difference Result 261 states and 283 transitions. [2021-11-13 18:48:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-13 18:48:37,677 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.5) internal successors, (385), 110 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-13 18:48:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:37,678 INFO L225 Difference]: With dead ends: 261 [2021-11-13 18:48:37,678 INFO L226 Difference]: Without dead ends: 259 [2021-11-13 18:48:37,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 243 SyntacticMatches, 21 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19170 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=3562, Invalid=66928, Unknown=0, NotChecked=0, Total=70490 [2021-11-13 18:48:37,684 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 670 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 8239 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3364.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 9114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.83ms SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 8239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3976.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:37,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 2059 Invalid, 9114 Unknown, 0 Unchecked, 17.83ms Time], IncrementalHoareTripleChecker [875 Valid, 8239 Invalid, 0 Unknown, 0 Unchecked, 3976.80ms Time] [2021-11-13 18:48:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-13 18:48:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 162. [2021-11-13 18:48:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.124223602484472) internal successors, (181), 161 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2021-11-13 18:48:37,734 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 157 [2021-11-13 18:48:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:37,734 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2021-11-13 18:48:37,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.5) internal successors, (385), 110 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2021-11-13 18:48:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:37,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:37,735 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:37,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:37,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-13 18:48:37,935 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1677188532, now seen corresponding path program 26 times [2021-11-13 18:48:37,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:37,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349626727] [2021-11-13 18:48:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:40,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:40,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349626727] [2021-11-13 18:48:40,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349626727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:40,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914647501] [2021-11-13 18:48:40,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:40,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:40,106 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:40,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-13 18:48:40,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:40,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:40,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-13 18:48:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:40,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:48:40,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:48:41,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:48:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:48:42,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:48:45,880 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:48:45,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:48:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-13 18:48:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914647501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:45,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:45,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 39, 40] total 114 [2021-11-13 18:48:45,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819088514] [2021-11-13 18:48:45,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:45,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-13 18:48:45,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-13 18:48:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=12301, Unknown=0, NotChecked=0, Total=12882 [2021-11-13 18:48:45,955 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand has 114 states, 114 states have (on average 3.5) internal successors, (399), 114 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:59,910 INFO L93 Difference]: Finished difference Result 271 states and 294 transitions. [2021-11-13 18:48:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-13 18:48:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.5) internal successors, (399), 114 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-13 18:48:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:59,913 INFO L225 Difference]: With dead ends: 271 [2021-11-13 18:48:59,913 INFO L226 Difference]: Without dead ends: 269 [2021-11-13 18:48:59,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 248 SyntacticMatches, 20 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14964 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=3419, Invalid=54903, Unknown=0, NotChecked=0, Total=58322 [2021-11-13 18:48:59,918 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 874 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 10002 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4026.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 10754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.68ms SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 10002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4768.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:59,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 2187 Invalid, 10754 Unknown, 0 Unchecked, 20.68ms Time], IncrementalHoareTripleChecker [752 Valid, 10002 Invalid, 0 Unknown, 0 Unchecked, 4768.52ms Time] [2021-11-13 18:48:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-13 18:48:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2021-11-13 18:48:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.121212121212121) internal successors, (185), 165 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2021-11-13 18:48:59,972 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 161 [2021-11-13 18:48:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:59,972 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2021-11-13 18:48:59,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.5) internal successors, (399), 114 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2021-11-13 18:48:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:48:59,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:59,973 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:59,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-13 18:49:00,174 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -845685014, now seen corresponding path program 27 times [2021-11-13 18:49:00,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:00,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962995177] [2021-11-13 18:49:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:00,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 513 proven. 354 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-13 18:49:00,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:00,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962995177] [2021-11-13 18:49:00,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962995177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:00,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880121292] [2021-11-13 18:49:00,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:00,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:00,871 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:00,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-13 18:49:01,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-13 18:49:01,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 18:49:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-13 18:49:02,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-13 18:49:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880121292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:03,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:03,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2021-11-13 18:49:03,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036399948] [2021-11-13 18:49:03,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 18:49:03,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 18:49:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:49:03,107 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand has 59 states, 59 states have (on average 3.305084745762712) internal successors, (195), 59 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:03,931 INFO L93 Difference]: Finished difference Result 382 states and 425 transitions. [2021-11-13 18:49:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:49:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.305084745762712) internal successors, (195), 59 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-13 18:49:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:03,933 INFO L225 Difference]: With dead ends: 382 [2021-11-13 18:49:03,933 INFO L226 Difference]: Without dead ends: 182 [2021-11-13 18:49:03,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:49:03,934 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 822 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 394.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.75ms SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 487.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:03,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 265 Invalid, 1094 Unknown, 0 Unchecked, 3.75ms Time], IncrementalHoareTripleChecker [342 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 487.27ms Time] [2021-11-13 18:49:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-13 18:49:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 171. [2021-11-13 18:49:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 170 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2021-11-13 18:49:03,985 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 165 [2021-11-13 18:49:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:03,985 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2021-11-13 18:49:03,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.305084745762712) internal successors, (195), 59 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2021-11-13 18:49:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 18:49:03,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:03,987 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:04,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:04,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:04,203 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:04,203 INFO L85 PathProgramCache]: Analyzing trace with hash -6275504, now seen corresponding path program 28 times [2021-11-13 18:49:04,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:04,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955036638] [2021-11-13 18:49:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:04,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:05,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:05,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955036638] [2021-11-13 18:49:05,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955036638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:05,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070148875] [2021-11-13 18:49:05,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:49:05,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:05,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:05,750 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:05,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-13 18:49:05,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:05,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-13 18:49:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:05,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:06,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:49:07,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:49:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 18:49:07,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:11,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:49:11,213 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:49:11,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 165 [2021-11-13 18:49:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 18:49:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070148875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:11,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:11,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 97 [2021-11-13 18:49:11,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376183924] [2021-11-13 18:49:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:11,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-13 18:49:11,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-13 18:49:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=8972, Unknown=0, NotChecked=0, Total=9312 [2021-11-13 18:49:11,295 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand has 97 states, 97 states have (on average 3.752577319587629) internal successors, (364), 97 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:19,864 INFO L93 Difference]: Finished difference Result 285 states and 309 transitions. [2021-11-13 18:49:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-13 18:49:19,864 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.752577319587629) internal successors, (364), 97 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-13 18:49:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:19,866 INFO L225 Difference]: With dead ends: 285 [2021-11-13 18:49:19,866 INFO L226 Difference]: Without dead ends: 283 [2021-11-13 18:49:19,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 266 SyntacticMatches, 38 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7356 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1027, Invalid=29423, Unknown=0, NotChecked=0, Total=30450 [2021-11-13 18:49:19,868 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 350 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 10194 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3913.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 10551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.95ms SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 10194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4645.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:19,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 2253 Invalid, 10551 Unknown, 0 Unchecked, 16.95ms Time], IncrementalHoareTripleChecker [357 Valid, 10194 Invalid, 0 Unknown, 0 Unchecked, 4645.77ms Time] [2021-11-13 18:49:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-13 18:49:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2021-11-13 18:49:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-11-13 18:49:19,922 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 170 [2021-11-13 18:49:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:19,923 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-11-13 18:49:19,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.752577319587629) internal successors, (364), 97 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-11-13 18:49:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 18:49:19,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:19,924 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:20,124 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1499033210, now seen corresponding path program 29 times [2021-11-13 18:49:20,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:20,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986697444] [2021-11-13 18:49:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:20,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 579 proven. 393 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-13 18:49:20,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:20,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986697444] [2021-11-13 18:49:20,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986697444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:20,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800147625] [2021-11-13 18:49:20,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:49:20,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:20,800 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:20,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-13 18:49:21,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-13 18:49:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:21,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 18:49:21,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 648 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 18:49:22,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 648 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 18:49:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800147625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:23,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:23,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2021-11-13 18:49:23,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819154272] [2021-11-13 18:49:23,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:23,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 18:49:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 18:49:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:49:23,248 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 62 states, 62 states have (on average 4.225806451612903) internal successors, (262), 62 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:24,098 INFO L93 Difference]: Finished difference Result 402 states and 447 transitions. [2021-11-13 18:49:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:49:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.225806451612903) internal successors, (262), 62 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-13 18:49:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:24,100 INFO L225 Difference]: With dead ends: 402 [2021-11-13 18:49:24,100 INFO L226 Difference]: Without dead ends: 191 [2021-11-13 18:49:24,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:49:24,101 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 679 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 405.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 495.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:24,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 319 Invalid, 1164 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [243 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 495.73ms Time] [2021-11-13 18:49:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-13 18:49:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 180. [2021-11-13 18:49:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 179 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2021-11-13 18:49:24,154 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 174 [2021-11-13 18:49:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:24,154 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2021-11-13 18:49:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.225806451612903) internal successors, (262), 62 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2021-11-13 18:49:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-13 18:49:24,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:24,155 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:24,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:24,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-13 18:49:24,356 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1183138084, now seen corresponding path program 30 times [2021-11-13 18:49:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:24,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046335554] [2021-11-13 18:49:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:24,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:26,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:26,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046335554] [2021-11-13 18:49:26,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046335554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:26,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388006207] [2021-11-13 18:49:26,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:49:26,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:26,867 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:26,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-13 18:49:27,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-13 18:49:27,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-13 18:49:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:27,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:49:28,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:49:28,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:49:31,767 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-13 18:49:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-11-13 18:49:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 37 proven. 1180 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 18:49:31,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-13 18:49:38,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388006207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:38,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:38,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 47, 45] total 134 [2021-11-13 18:49:38,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530946964] [2021-11-13 18:49:38,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:38,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-13 18:49:38,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-13 18:49:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1862, Invalid=15960, Unknown=0, NotChecked=0, Total=17822 [2021-11-13 18:49:38,269 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand has 134 states, 134 states have (on average 3.3805970149253732) internal successors, (453), 134 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:30,331 INFO L93 Difference]: Finished difference Result 583 states and 680 transitions. [2021-11-13 18:50:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2021-11-13 18:50:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.3805970149253732) internal successors, (453), 134 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-13 18:50:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:30,335 INFO L225 Difference]: With dead ends: 583 [2021-11-13 18:50:30,335 INFO L226 Difference]: Without dead ends: 581 [2021-11-13 18:50:30,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 272 SyntacticMatches, 20 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50941 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=17154, Invalid=133778, Unknown=0, NotChecked=0, Total=150932 [2021-11-13 18:50:30,343 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1054 mSDsluCounter, 4258 mSDsCounter, 0 mSdLazyCounter, 8674 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4152.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 4305 SdHoareTripleChecker+Invalid, 9908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.02ms SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 8674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 4860.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:30,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 4305 Invalid, 9908 Unknown, 0 Unchecked, 24.02ms Time], IncrementalHoareTripleChecker [704 Valid, 8674 Invalid, 0 Unknown, 530 Unchecked, 4860.77ms Time] [2021-11-13 18:50:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-13 18:50:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 320. [2021-11-13 18:50:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.29153605015674) internal successors, (412), 319 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 412 transitions. [2021-11-13 18:50:30,505 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 412 transitions. Word has length 179 [2021-11-13 18:50:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:30,505 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 412 transitions. [2021-11-13 18:50:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.3805970149253732) internal successors, (453), 134 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 412 transitions. [2021-11-13 18:50:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-13 18:50:30,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:30,507 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:30,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:30,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:30,707 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash 280621830, now seen corresponding path program 23 times [2021-11-13 18:50:30,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:30,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567976910] [2021-11-13 18:50:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:30,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 535 proven. 416 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-13 18:50:31,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:31,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567976910] [2021-11-13 18:50:31,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567976910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:31,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118458378] [2021-11-13 18:50:31,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:50:31,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:31,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:31,439 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:31,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-13 18:50:32,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-13 18:50:32,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-13 18:50:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 590 proven. 361 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-13 18:50:33,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 590 proven. 361 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-13 18:50:34,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118458378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:34,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:34,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2021-11-13 18:50:34,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24350243] [2021-11-13 18:50:34,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:34,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 18:50:34,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 18:50:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:50:34,166 INFO L87 Difference]: Start difference. First operand 320 states and 412 transitions. Second operand has 65 states, 65 states have (on average 2.753846153846154) internal successors, (179), 65 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:35,544 INFO L93 Difference]: Finished difference Result 768 states and 955 transitions. [2021-11-13 18:50:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-13 18:50:35,545 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.753846153846154) internal successors, (179), 65 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-13 18:50:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:35,547 INFO L225 Difference]: With dead ends: 768 [2021-11-13 18:50:35,547 INFO L226 Difference]: Without dead ends: 411 [2021-11-13 18:50:35,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2021-11-13 18:50:35,549 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1024 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 596.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.82ms SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 746.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:35,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 394 Invalid, 1520 Unknown, 0 Unchecked, 5.82ms Time], IncrementalHoareTripleChecker [366 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 746.43ms Time] [2021-11-13 18:50:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-13 18:50:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 324. [2021-11-13 18:50:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.284829721362229) internal successors, (415), 323 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 415 transitions. [2021-11-13 18:50:35,712 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 415 transitions. Word has length 182 [2021-11-13 18:50:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:35,712 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 415 transitions. [2021-11-13 18:50:35,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.753846153846154) internal successors, (179), 65 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 415 transitions. [2021-11-13 18:50:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 18:50:35,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:35,714 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:35,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:35,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-13 18:50:35,915 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash -889473532, now seen corresponding path program 24 times [2021-11-13 18:50:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421200376] [2021-11-13 18:50:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:35,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:38,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:38,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421200376] [2021-11-13 18:50:38,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421200376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:38,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502383973] [2021-11-13 18:50:38,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:50:38,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:38,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:38,807 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:38,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-13 18:50:41,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-13 18:50:41,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:41,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-13 18:50:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:50:41,758 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-13 18:50:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-13 18:50:41,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:50:41,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:41,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2021-11-13 18:50:41,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943112720] [2021-11-13 18:50:41,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:41,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 18:50:41,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 18:50:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=4830, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:50:41,877 INFO L87 Difference]: Start difference. First operand 324 states and 415 transitions. Second operand has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 69 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:52,810 INFO L93 Difference]: Finished difference Result 693 states and 842 transitions. [2021-11-13 18:50:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-13 18:50:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 69 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 18:50:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:52,814 INFO L225 Difference]: With dead ends: 693 [2021-11-13 18:50:52,814 INFO L226 Difference]: Without dead ends: 691 [2021-11-13 18:50:52,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11048 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2979, Invalid=41331, Unknown=0, NotChecked=0, Total=44310 [2021-11-13 18:50:52,817 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 665 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 7256 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3060.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 8229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.66ms SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 7256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3641.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:52,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1937 Invalid, 8229 Unknown, 0 Unchecked, 17.66ms Time], IncrementalHoareTripleChecker [973 Valid, 7256 Invalid, 0 Unknown, 0 Unchecked, 3641.44ms Time] [2021-11-13 18:50:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-11-13 18:50:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 329. [2021-11-13 18:50:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.2865853658536586) internal successors, (422), 328 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 422 transitions. [2021-11-13 18:50:53,025 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 422 transitions. Word has length 184 [2021-11-13 18:50:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:53,025 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 422 transitions. [2021-11-13 18:50:53,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 69 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 422 transitions. [2021-11-13 18:50:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 18:50:53,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:53,028 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:53,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:53,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:53,243 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 677284418, now seen corresponding path program 25 times [2021-11-13 18:50:53,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:53,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464963752] [2021-11-13 18:50:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:53,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:55,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:55,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464963752] [2021-11-13 18:50:55,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464963752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:55,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261754870] [2021-11-13 18:50:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:50:55,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:55,957 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:55,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-13 18:50:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-13 18:50:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:56,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:50:56,671 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-13 18:50:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-13 18:50:56,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:50:56,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:56,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-11-13 18:50:56,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092947539] [2021-11-13 18:50:56,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:56,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-13 18:50:56,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-13 18:50:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=4550, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:50:56,866 INFO L87 Difference]: Start difference. First operand 329 states and 422 transitions. Second operand has 68 states, 68 states have (on average 2.7058823529411766) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:06,968 INFO L93 Difference]: Finished difference Result 523 states and 616 transitions. [2021-11-13 18:51:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-13 18:51:06,968 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.7058823529411766) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 18:51:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:06,971 INFO L225 Difference]: With dead ends: 523 [2021-11-13 18:51:06,971 INFO L226 Difference]: Without dead ends: 521 [2021-11-13 18:51:06,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8570 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2604, Invalid=34068, Unknown=0, NotChecked=0, Total=36672 [2021-11-13 18:51:06,974 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 601 mSDsluCounter, 3442 mSDsCounter, 0 mSdLazyCounter, 10005 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3595.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 10426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.69ms SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 10005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4300.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:06,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 3533 Invalid, 10426 Unknown, 0 Unchecked, 19.69ms Time], IncrementalHoareTripleChecker [421 Valid, 10005 Invalid, 0 Unknown, 0 Unchecked, 4300.38ms Time] [2021-11-13 18:51:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-13 18:51:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 189. [2021-11-13 18:51:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.122340425531915) internal successors, (211), 188 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 211 transitions. [2021-11-13 18:51:07,057 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 211 transitions. Word has length 184 [2021-11-13 18:51:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:07,057 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 211 transitions. [2021-11-13 18:51:07,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.7058823529411766) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 211 transitions. [2021-11-13 18:51:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 18:51:07,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:07,058 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:07,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:07,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-13 18:51:07,259 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1805689928, now seen corresponding path program 31 times [2021-11-13 18:51:07,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:07,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554346259] [2021-11-13 18:51:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:07,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:08,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:08,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554346259] [2021-11-13 18:51:08,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554346259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:08,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083542796] [2021-11-13 18:51:08,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:51:08,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:08,996 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:08,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-13 18:51:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 146 conjunts are in the unsatisfiable core [2021-11-13 18:51:09,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-13 18:51:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-13 18:51:11,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-13 18:51:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:51:11,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:16,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2021-11-13 18:51:16,258 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-13 18:51:16,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 242 [2021-11-13 18:51:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-13 18:51:16,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083542796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:16,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:16,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 108 [2021-11-13 18:51:16,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942196667] [2021-11-13 18:51:16,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:16,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-13 18:51:16,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-13 18:51:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=11176, Unknown=0, NotChecked=0, Total=11556 [2021-11-13 18:51:16,344 INFO L87 Difference]: Start difference. First operand 189 states and 211 transitions. Second operand has 108 states, 108 states have (on average 3.7777777777777777) internal successors, (408), 108 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:27,281 INFO L93 Difference]: Finished difference Result 313 states and 339 transitions. [2021-11-13 18:51:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-13 18:51:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.7777777777777777) internal successors, (408), 108 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-13 18:51:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:27,283 INFO L225 Difference]: With dead ends: 313 [2021-11-13 18:51:27,283 INFO L226 Difference]: Without dead ends: 311 [2021-11-13 18:51:27,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 292 SyntacticMatches, 43 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9067 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1141, Invalid=36301, Unknown=0, NotChecked=0, Total=37442 [2021-11-13 18:51:27,288 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 313 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 12875 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4962.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 13206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.09ms SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 12875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5899.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:27,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2965 Invalid, 13206 Unknown, 0 Unchecked, 21.09ms Time], IncrementalHoareTripleChecker [331 Valid, 12875 Invalid, 0 Unknown, 0 Unchecked, 5899.60ms Time] [2021-11-13 18:51:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-13 18:51:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 193. [2021-11-13 18:51:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1197916666666667) internal successors, (215), 192 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 215 transitions. [2021-11-13 18:51:27,368 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 215 transitions. Word has length 188 [2021-11-13 18:51:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:27,368 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 215 transitions. [2021-11-13 18:51:27,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.7777777777777777) internal successors, (408), 108 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 215 transitions. [2021-11-13 18:51:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:51:27,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:27,369 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:27,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:27,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-13 18:51:27,570 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1648933614, now seen corresponding path program 32 times [2021-11-13 18:51:27,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:27,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674200997] [2021-11-13 18:51:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:27,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 723 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 18:51:28,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674200997] [2021-11-13 18:51:28,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674200997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472469477] [2021-11-13 18:51:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:51:28,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:28,292 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:28,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-13 18:51:28,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:51:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:28,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 18:51:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 18:51:29,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 18:51:30,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472469477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:30,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:30,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2021-11-13 18:51:30,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589401384] [2021-11-13 18:51:30,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:30,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-13 18:51:30,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:30,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-13 18:51:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:51:30,283 INFO L87 Difference]: Start difference. First operand 193 states and 215 transitions. Second operand has 68 states, 68 states have (on average 3.3088235294117645) internal successors, (225), 68 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:31,590 INFO L93 Difference]: Finished difference Result 442 states and 491 transitions. [2021-11-13 18:51:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-13 18:51:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.3088235294117645) internal successors, (225), 68 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-13 18:51:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:31,593 INFO L225 Difference]: With dead ends: 442 [2021-11-13 18:51:31,593 INFO L226 Difference]: Without dead ends: 209 [2021-11-13 18:51:31,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2021-11-13 18:51:31,595 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1089 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 620.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.74ms SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 758.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:31,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 412 Invalid, 1573 Unknown, 0 Unchecked, 5.74ms Time], IncrementalHoareTripleChecker [382 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 758.25ms Time] [2021-11-13 18:51:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-13 18:51:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2021-11-13 18:51:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1218274111675126) internal successors, (221), 197 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 221 transitions. [2021-11-13 18:51:31,697 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 221 transitions. Word has length 192 [2021-11-13 18:51:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:31,697 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 221 transitions. [2021-11-13 18:51:31,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.3088235294117645) internal successors, (225), 68 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 221 transitions. [2021-11-13 18:51:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 18:51:31,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:31,698 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:31,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:31,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-13 18:51:31,899 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1703045268, now seen corresponding path program 33 times [2021-11-13 18:51:31,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:31,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018944158] [2021-11-13 18:51:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:31,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:35,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:35,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018944158] [2021-11-13 18:51:35,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018944158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:35,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493770405] [2021-11-13 18:51:35,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:51:35,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:35,011 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:35,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a207301-59f6-4a54-a9a3-f98dc29402f0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-13 18:51:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-13 18:51:35,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-13 18:51:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:37,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-13 18:51:41,901 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-13 18:51:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2021-11-13 18:51:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 821 proven. 671 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-13 18:51:41,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-13 18:51:46,770 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 18:51:46,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-13 18:51:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-13 18:51:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493770405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:49,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:49,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 51, 49] total 167 [2021-11-13 18:51:49,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307748360] [2021-11-13 18:51:49,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:49,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-11-13 18:51:49,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:49,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-11-13 18:51:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=24230, Unknown=0, NotChecked=0, Total=27722 [2021-11-13 18:51:49,488 INFO L87 Difference]: Start difference. First operand 198 states and 221 transitions. Second operand has 167 states, 167 states have (on average 2.9880239520958085) internal successors, (499), 167 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)